Revert "Deprecate DefaultImpl methods in compatibility mode"

This reverts commit 6c9c2a28

compiler/backend/src/org/jetbrains/kotlin/codegen/FunctionCodegen.java

@@ -193,9 +193,6 @@ public class FunctionCodegen {
         if (origin.getOriginKind() == JvmDeclarationOriginKind.SAM_DELEGATION) {
             flags |= ACC_SYNTHETIC;
         }
-        if (isCompatibilityStubInDefaultImpls(functionDescriptor, methodContext, state.getJvmDefaultMode())) {
-            flags |= ACC_DEPRECATED;
-        }
 
         if (functionDescriptor.isExternal() && owner instanceof MultifileClassFacadeContext) {
             // Native methods are only defined in facades and do not need package part implementations
@@ -715,9 +712,9 @@ public class FunctionCodegen {
             @NotNull JvmDefaultMode jvmDefaultMode
     ) {
         return OwnerKind.DEFAULT_IMPLS == context.getContextKind() &&
-               jvmDefaultMode.isCompatibility() &&
                JvmAnnotationUtilKt.isCompiledToJvmDefault(DescriptorUtils.unwrapFakeOverrideToAnyDeclaration(functionDescriptor),
-                                                          jvmDefaultMode);
+                                               jvmDefaultMode) &&
+               jvmDefaultMode.isCompatibility();
     }
 
     private static void generateLocalVariableTable(