Eliminated 'has backing field' metadata protobuf extension field.

We have IR for this information.

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/descriptors/utils.kt

@@ -7,15 +7,8 @@ package org.jetbrains.kotlin.backend.konan.descriptors
 
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.metadata.konan.KonanProtoBuf
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.*
 
-val DeserializedPropertyDescriptor.konanBackingField: PropertyDescriptor?
-    get() = 
-        if (this.proto.getExtension(KonanProtoBuf.hasBackingField))
-            this 
-        else null
-
 fun DeclarationDescriptor.deepPrint() {
     this.accept(DeepPrintVisitor(PrintVisitor()), 0)
 }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ir/Ir.kt

@@ -37,11 +37,7 @@ import kotlin.properties.Delegates
 
 // This is what Context collects about IR.
 internal class KonanIr(context: Context, irModule: IrModuleFragment): Ir<Context>(context, irModule) {
-
-    val propertiesWithBackingFields = mutableSetOf<PropertyDescriptor>()
-
     override var symbols: KonanSymbols by Delegates.notNull()
-
 }
 
 internal class KonanSymbols(context: Context, private val symbolTable: SymbolTable, lazySymbolTable: ReferenceSymbolTable): Symbols<Context>(context, lazySymbolTable) {

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/serialization/KonanSerializerExtension.kt

@@ -76,9 +76,6 @@ internal class KonanSerializerExtension(val context: Context, override val metad
                                    childSerializer: DescriptorSerializer) {
         proto.setExtension(KonanProtoBuf.propertyFile, sourceFileMap.assign(descriptor.source.containingFile))
         uniqId(descriptor) ?.let { proto.setExtension(KonanProtoBuf.propertyUniqId, it) }
-        proto.setExtension(KonanProtoBuf.hasBackingField,
-            context.ir.propertiesWithBackingFields.contains(descriptor))
-
         super.serializeProperty(descriptor, proto, versionRequirementTable, childSerializer)
     }
 

extracted/konan.metadata/src/KonanProtoBuf.proto

@@ -44,7 +44,6 @@ extend Property {
     repeated Annotation property_annotation = 170;
     repeated Annotation property_getter_annotation = 177;
     repeated Annotation property_setter_annotation = 178;
-    optional bool has_backing_field = 171;
     optional Annotation.Argument.Value compile_time_value = 173;
     optional int32 property_file = 176;
     optional DescriptorUniqId property_uniq_id = 179;