Don't serialize fake overrides anymore

compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/overrides/FakeOverrides.kt

@@ -63,12 +63,6 @@ object DefaultFakeOverrideClassFilter : FakeOverrideClassFilter {
     override fun needToConstructFakeOverrides(clazz: IrClass): Boolean = true
 }
 
-object FakeOverrideControl {
-    // If set to true: all fake overrides go to klib serialized IR.
-    // If set to false: eligible fake overrides are not serialized.
-    val serializeFakeOverrides: Boolean = true
-}
-
 class FakeOverrideBuilder(
     val linker: FileLocalAwareLinker,
     val symbolTable: SymbolTable,

compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileSerializer.kt

@@ -7,7 +7,6 @@ package org.jetbrains.kotlin.backend.common.serialization
 
 import org.jetbrains.kotlin.backend.common.LoggingContext
 import org.jetbrains.kotlin.backend.common.ir.ir2string
-import org.jetbrains.kotlin.backend.common.overrides.FakeOverrideControl
 import org.jetbrains.kotlin.backend.common.serialization.encodings.*
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.ir.IrElement
@@ -1243,7 +1242,6 @@ open class IrFileSerializer(
 
     fun memberNeedsSerialization(member: IrDeclaration): Boolean {
         assert(member.parent is IrClass)
-        if (FakeOverrideControl.serializeFakeOverrides) return true
         if (backendSpecificSerializeAllMembers(member.parent as IrClass)) return true
 
         return (!member.isFakeOverride)

compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/lower/serialization/ir/JsIrLinker.kt

@@ -7,7 +7,6 @@ package org.jetbrains.kotlin.ir.backend.js.lower.serialization.ir
 
 import org.jetbrains.kotlin.backend.common.LoggingContext
 import org.jetbrains.kotlin.backend.common.overrides.FakeOverrideBuilder
-import org.jetbrains.kotlin.backend.common.overrides.FakeOverrideControl
 import org.jetbrains.kotlin.backend.common.serialization.*
 import org.jetbrains.kotlin.backend.common.serialization.signature.IdSignatureSerializer
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor

compiler/ir/serialization.jvm/src/org/jetbrains/kotlin/ir/backend/jvm/serialization/JvmIrLinker.kt

@@ -7,7 +7,6 @@ package org.jetbrains.kotlin.ir.backend.jvm.serialization
 
 import org.jetbrains.kotlin.backend.common.LoggingContext
 import org.jetbrains.kotlin.backend.common.overrides.FakeOverrideBuilder
-import org.jetbrains.kotlin.backend.common.overrides.FakeOverrideControl
 import org.jetbrains.kotlin.backend.common.serialization.*
 import org.jetbrains.kotlin.backend.common.serialization.encodings.BinarySymbolData
 import org.jetbrains.kotlin.backend.common.serialization.signature.IdSignatureSerializer