[Platform API] Clean-up some usages of Platform

Mostly unused imports. Also, in some places,
TargetPlatform/MultiTargetPlatform were just passed around without
actually using (e.g. in deserialization)

idea/idea-native/src/org/jetbrains/kotlin/ide/konan/KotlinNativePluginUtil.kt

@@ -33,7 +33,6 @@ import org.jetbrains.kotlin.konan.library.createKonanLibrary
 import org.jetbrains.kotlin.metadata.konan.KonanProtoBuf
 import org.jetbrains.kotlin.psi.stubs.elements.KtStubElementTypes
 import org.jetbrains.kotlin.resolve.CompilerDeserializationConfiguration
-import org.jetbrains.kotlin.resolve.konan.platform.KonanPlatform
 import org.jetbrains.kotlin.storage.StorageManager
 
 const val KOTLIN_NATIVE_CURRENT_ABI_VERSION = 1

idea/idea-native/src/org/jetbrains/kotlin/ide/konan/analyzer/NativeResolverForModuleFactory.kt

@@ -23,9 +23,6 @@ import org.jetbrains.kotlin.resolve.lazy.ResolveSession
 import org.jetbrains.kotlin.resolve.lazy.declarations.DeclarationProviderFactoryService.Companion.createDeclarationProviderFactory
 
 object NativeResolverForModuleFactory : ResolverForModuleFactory() {
-    override val targetPlatform: TargetPlatform
-        get() = KonanPlatform
-
     override fun <M : ModuleInfo> createResolverForModule(
         moduleDescriptor: ModuleDescriptorImpl,
         moduleContext: ModuleContext,
@@ -49,7 +46,7 @@ object NativeResolverForModuleFactory : ResolverForModuleFactory() {
             moduleContext,
             declarationProviderFactory,
             CodeAnalyzerInitializer.getInstance(moduleContext.project).createTrace(),
-            targetPlatform,
+            KonanPlatform,
             TargetPlatformVersion.NoVersion,
             targetEnvironment,
             languageVersionSettings

idea/idea-native/src/org/jetbrains/kotlin/ide/konan/decompiler/KotlinNativeMetadataDecompiler.kt

@@ -11,12 +11,11 @@ import com.intellij.openapi.fileTypes.FileTypeFactory
 import com.intellij.openapi.vfs.VirtualFile
 import org.jetbrains.kotlin.konan.library.KLIB_METADATA_FILE_EXTENSION
 import org.jetbrains.kotlin.metadata.deserialization.BinaryVersion
-import org.jetbrains.kotlin.resolve.konan.platform.KonanPlatform
 import org.jetbrains.kotlin.serialization.konan.KonanSerializerProtocol
 import org.jetbrains.kotlin.serialization.konan.NullFlexibleTypeDeserializer
 
 class KotlinNativeMetadataDecompiler : KotlinNativeMetadataDecompilerBase<KotlinNativeMetadataVersion>(
-    KotlinNativeMetaFileType, KonanPlatform, KonanSerializerProtocol, NullFlexibleTypeDeserializer,
+    KotlinNativeMetaFileType, KonanSerializerProtocol, NullFlexibleTypeDeserializer,
     KotlinNativeMetadataVersion.DEFAULT_INSTANCE,
     KotlinNativeMetadataVersion.INVALID_VERSION,
     KotlinNativeMetaFileType.STUB_VERSION

idea/idea-native/src/org/jetbrains/kotlin/ide/konan/decompiler/KotlinNativeMetadataDecompilerBase.kt

@@ -21,7 +21,6 @@ import org.jetbrains.kotlin.metadata.deserialization.NameResolverImpl
 import org.jetbrains.kotlin.metadata.konan.KonanProtoBuf
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.renderer.DescriptorRenderer
-import org.jetbrains.kotlin.resolve.TargetPlatform
 import org.jetbrains.kotlin.serialization.SerializerExtensionProtocol
 import org.jetbrains.kotlin.serialization.deserialization.ClassDeserializer
 import org.jetbrains.kotlin.serialization.deserialization.FlexibleTypeDeserializer
@@ -31,7 +30,6 @@ import java.io.IOException
 
 abstract class KotlinNativeMetadataDecompilerBase<out V : BinaryVersion>(
     private val fileType: FileType,
-    private val targetPlatform: TargetPlatform,
     private val serializerProtocol: SerializerExtensionProtocol,
     private val flexibleTypeDeserializer: FlexibleTypeDeserializer,
     private val expectedBinaryVersion: V,
@@ -86,7 +84,6 @@ abstract class KotlinNativeMetadataDecompilerBase<out V : BinaryVersion>(
             is FileWithMetadata.Incompatible -> createIncompatibleAbiVersionDecompiledText(expectedBinaryVersion, file.version)
             is FileWithMetadata.Compatible -> decompiledText(
                 file,
-                targetPlatform,
                 serializerProtocol,
                 flexibleTypeDeserializer,
                 renderer
@@ -116,7 +113,7 @@ sealed class FileWithMetadata {
 
 //todo: this function is extracted for KotlinNativeMetadataStubBuilder, that's the difference from Big Kotlin.
 fun decompiledText(
-    file: FileWithMetadata.Compatible, targetPlatform: TargetPlatform,
+    file: FileWithMetadata.Compatible,
     serializerProtocol: SerializerExtensionProtocol,
     flexibleTypeDeserializer: FlexibleTypeDeserializer,
     renderer: DescriptorRenderer
@@ -124,7 +121,7 @@ fun decompiledText(
     val packageFqName = file.packageFqName
     val resolver = KotlinNativeMetadataDeserializerForDecompiler(
         packageFqName, file.proto, file.nameResolver,
-        targetPlatform, serializerProtocol, flexibleTypeDeserializer
+        serializerProtocol, flexibleTypeDeserializer
     )
     val declarations = arrayListOf<DeclarationDescriptor>()
     declarations.addAll(resolver.resolveDeclarationsInFacade(packageFqName))

idea/idea-native/src/org/jetbrains/kotlin/ide/konan/decompiler/KotlinNativeMetadataDeserializerForDecompiler.kt

@@ -18,7 +18,6 @@ import org.jetbrains.kotlin.incremental.components.LookupTracker
 import org.jetbrains.kotlin.metadata.deserialization.NameResolver
 import org.jetbrains.kotlin.metadata.konan.KonanProtoBuf
 import org.jetbrains.kotlin.name.FqName
-import org.jetbrains.kotlin.resolve.TargetPlatform
 import org.jetbrains.kotlin.serialization.SerializerExtensionProtocol
 import org.jetbrains.kotlin.serialization.deserialization.*
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedPackageMemberScope
@@ -27,7 +26,6 @@ class KotlinNativeMetadataDeserializerForDecompiler(
     packageFqName: FqName,
     private val proto: KonanProtoBuf.LinkDataPackageFragment,
     private val nameResolver: NameResolver,
-    override val targetPlatform: TargetPlatform,
     serializerProtocol: SerializerExtensionProtocol,
     flexibleTypeDeserializer: FlexibleTypeDeserializer
 ) : DeserializerForDecompilerBase(packageFqName) {

idea/idea-native/src/org/jetbrains/kotlin/ide/konan/decompiler/KotlinNativeMetadataStubBuilder.kt

@@ -12,12 +12,9 @@ import com.intellij.psi.impl.compiled.ClassFileStubBuilder
 import com.intellij.psi.stubs.PsiFileStub
 import com.intellij.util.indexing.FileContent
 import org.jetbrains.kotlin.ide.konan.createFileStub
-import org.jetbrains.kotlin.ide.konan.decompiler.FileWithMetadata
-import org.jetbrains.kotlin.ide.konan.decompiler.decompiledText
 import org.jetbrains.kotlin.idea.decompiler.stubBuilder.createIncompatibleAbiVersionFileStub
 import org.jetbrains.kotlin.idea.decompiler.textBuilder.defaultDecompilerRendererOptions
 import org.jetbrains.kotlin.renderer.DescriptorRenderer
-import org.jetbrains.kotlin.resolve.konan.platform.KonanPlatform
 import org.jetbrains.kotlin.serialization.SerializerExtensionProtocol
 import org.jetbrains.kotlin.serialization.konan.NullFlexibleTypeDeserializer
 
@@ -42,7 +39,6 @@ open class KotlinNativeMetadataStubBuilder(
                 val renderer = DescriptorRenderer.withOptions { defaultDecompilerRendererOptions() }
                 val ktFileText = decompiledText(
                     file,
-                    KonanPlatform,
                     serializerProtocol,
                     NullFlexibleTypeDeserializer,
                     renderer