K2: Remove a bunch of unused declarations

compiler/fir/fir-serialization/src/org/jetbrains/kotlin/fir/serialization/FirElementSerializer.kt

@@ -32,11 +32,14 @@ import org.jetbrains.kotlin.fir.expressions.builder.buildConstExpression
 import org.jetbrains.kotlin.fir.expressions.impl.FirEmptyAnnotationArgumentMapping
 import org.jetbrains.kotlin.fir.extensions.extensionService
 import org.jetbrains.kotlin.fir.extensions.typeAttributeExtensions
-import org.jetbrains.kotlin.fir.resolve.*
+import org.jetbrains.kotlin.fir.resolve.ScopeSession
+import org.jetbrains.kotlin.fir.resolve.fullyExpandedType
 import org.jetbrains.kotlin.fir.resolve.providers.symbolProvider
+import org.jetbrains.kotlin.fir.resolve.toSymbol
 import org.jetbrains.kotlin.fir.scopes.*
 import org.jetbrains.kotlin.fir.scopes.impl.nestedClassifierScope
-import org.jetbrains.kotlin.fir.serialization.constant.*
+import org.jetbrains.kotlin.fir.serialization.constant.hasConstantValue
+import org.jetbrains.kotlin.fir.serialization.constant.toConstantValue
 import org.jetbrains.kotlin.fir.symbols.impl.*
 import org.jetbrains.kotlin.fir.types.*
 import org.jetbrains.kotlin.fir.types.builder.buildResolvedTypeRef
@@ -1100,9 +1103,6 @@ class FirElementSerializer private constructor(
         return writeLanguageVersionRequirement(languageFeature, this)
     }
 
-    private fun MutableVersionRequirementTable.writeCompilerVersionRequirement(major: Int, minor: Int, patch: Int): Int =
-        writeCompilerVersionRequirement(major, minor, patch, this)
-
     private fun MutableVersionRequirementTable.writeVersionRequirementDependingOnCoroutinesVersion(): Int =
         writeVersionRequirement(LanguageFeature.ReleaseCoroutines)
 
@@ -1273,17 +1273,6 @@ class FirElementSerializer private constructor(
             )
         }
 
-        fun writeCompilerVersionRequirement(
-            major: Int,
-            minor: Int,
-            patch: Int,
-            versionRequirementTable: MutableVersionRequirementTable
-        ): Int = writeVersionRequirement(
-            major, minor, patch,
-            ProtoBuf.VersionRequirement.VersionKind.COMPILER_VERSION,
-            versionRequirementTable
-        )
-
         fun writeVersionRequirement(
             major: Int,
             minor: Int,

compiler/fir/fir-serialization/src/org/jetbrains/kotlin/fir/serialization/constant/ConstantValueUtils.kt

@@ -11,13 +11,10 @@ import org.jetbrains.kotlin.constant.ConstantValue
 import org.jetbrains.kotlin.constant.ErrorValue
 import org.jetbrains.kotlin.constant.KClassValue
 import org.jetbrains.kotlin.fir.FirSession
-import org.jetbrains.kotlin.fir.declarations.FirRegularClass
 import org.jetbrains.kotlin.fir.declarations.FirValueParameter
 import org.jetbrains.kotlin.fir.expressions.FirExpression
 import org.jetbrains.kotlin.fir.languageVersionSettings
 import org.jetbrains.kotlin.fir.render
-import org.jetbrains.kotlin.fir.resolve.defaultType
-import org.jetbrains.kotlin.fir.resolve.providers.symbolProvider
 import org.jetbrains.kotlin.fir.types.*
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.utils.addToStdlib.runIf
@@ -53,21 +50,6 @@ inline fun <reified T : ConeKotlinType> KClassValue.Value.LocalClass.coneType():
     return this.type as T
 }
 
-internal fun KClassValue.getArgumentType(session: FirSession): ConeKotlinType? {
-    when (val castedValue = value) {
-        is KClassValue.Value.LocalClass -> return castedValue.type as ConeKotlinType
-        is KClassValue.Value.NormalClass -> {
-            val (classId, arrayDimensions) = castedValue.value
-            val klass = session.symbolProvider.getClassLikeSymbolByClassId(classId)?.fir as? FirRegularClass ?: return null
-            var type: ConeClassLikeType = klass.defaultType().replaceArgumentsWithStarProjections()
-            repeat(arrayDimensions) {
-                type = type.createArrayType()
-            }
-            return type
-        }
-    }
-}
-
 internal fun create(argumentType: ConeKotlinType): ConstantValue<*>? {
     if (argumentType is ConeErrorType) return null
     if (argumentType !is ConeClassLikeType) return null