[IR] Drop unused methods of ReferenceSymbolTable

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/SymbolTable.kt

@@ -47,9 +47,6 @@ interface ReferenceSymbolTable {
     fun referenceProperty(descriptor: PropertyDescriptor): IrPropertySymbol
     fun referenceProperty(signature: IdSignature): IrPropertySymbol
 
-    @ObsoleteDescriptorBasedAPI
-    fun referenceProperty(descriptor: PropertyDescriptor, generate: () -> IrProperty): IrProperty
-
     @ObsoleteDescriptorBasedAPI
     fun referenceSimpleFunction(descriptor: FunctionDescriptor): IrSimpleFunctionSymbol
     fun referenceSimpleFunction(signature: IdSignature): IrSimpleFunctionSymbol
@@ -67,9 +64,6 @@ interface ReferenceSymbolTable {
     @ObsoleteDescriptorBasedAPI
     fun referenceScopedTypeParameter(classifier: TypeParameterDescriptor): IrTypeParameterSymbol
 
-    @ObsoleteDescriptorBasedAPI
-    fun referenceVariable(descriptor: VariableDescriptor): IrVariableSymbol
-
     @ObsoleteDescriptorBasedAPI
     fun referenceTypeAlias(descriptor: TypeAliasDescriptor): IrTypeAliasSymbol
     fun referenceTypeAlias(signature: IdSignature): IrTypeAliasSymbol
@@ -778,14 +772,6 @@ open class SymbolTable(
 
     val unboundFields: Set<IrFieldSymbol> get() = fieldSymbolTable.unboundSymbols
 
-    @Deprecated(message = "Use declareProperty/referenceProperty", level = DeprecationLevel.WARNING)
-    val propertyTable = HashMap<PropertyDescriptor, IrProperty>()
-
-    @ObsoleteDescriptorBasedAPI
-    override fun referenceProperty(descriptor: PropertyDescriptor, generate: () -> IrProperty): IrProperty =
-        @Suppress("DEPRECATION")
-        propertyTable.getOrPut(descriptor, generate)
-
     private fun createPropertySymbol(descriptor: PropertyDescriptor, signature: IdSignature?): IrPropertySymbol =
         signature?.let { IrPropertyPublicSymbolImpl(it, descriptor) } ?: IrPropertySymbolImpl(descriptor)
 
@@ -1144,10 +1130,6 @@ open class SymbolTable(
             initializer = irInitializerExpression
         }
 
-    @ObsoleteDescriptorBasedAPI
-    override fun referenceVariable(descriptor: VariableDescriptor) =
-        variableSymbolTable.referenced(descriptor) { throw AssertionError("Undefined variable referenced: $descriptor") }
-
     @ObsoleteDescriptorBasedAPI
     fun declareLocalDelegatedProperty(
         startOffset: Int,