IR: remove unused functions

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/IrElementTransformerVoidWithContext.kt

@@ -18,7 +18,6 @@ package org.jetbrains.kotlin.backend.common
 
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.IrStatement
-import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.builders.Scope
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
@@ -104,11 +103,6 @@ abstract class IrElementTransformerVoidWithContext : IrElementTransformerVoid()
     protected val allScopes get() = scopeStack
     protected val currentDeclarationParent get() = scopeStack.lastOrNull { it.irElement is IrDeclarationParent }?.irElement as? IrDeclarationParent
 
-    @ObsoleteDescriptorBasedAPI
-    fun printScopeStack() {
-        scopeStack.forEach { println(it.scope.scopeOwner) }
-    }
-
     open fun visitFileNew(declaration: IrFile): IrFile {
         return super.visitFile(declaration)
     }

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

@@ -730,10 +730,6 @@ class RenderIrElementVisitor(private val normalizeNames: Boolean = false) : IrEl
     private val descriptorRendererForErrorDeclarations = DescriptorRenderer.ONLY_NAMES_WITH_SHORT_TYPES
 }
 
-@ObsoleteDescriptorBasedAPI
-internal fun IrDeclaration.name(): String =
-    descriptor.name.toString()
-
 internal fun DescriptorRenderer.renderDescriptor(descriptor: DeclarationDescriptor): String =
     if (descriptor is ReceiverParameterDescriptor)
         "this@${descriptor.containingDeclaration.name}: ${descriptor.type}"