[FE] Stop ignoring ABSTRACT_MEMBER_NOT_IMPLEMENTED for expect classes

^KT-59739 Fixed
Review: https://jetbrains.team/p/kt/reviews/11038/timeline

core/compiler.common/src/org/jetbrains/kotlin/util/ImplementationStatus.kt

@@ -26,8 +26,7 @@ enum class ImplementationStatus {
     ALREADY_IMPLEMENTED,
 
     /**
-     * The symbol is not implemented in the class and it cannot be implemented. For example, it's final in super classes or the current
-     * class is `expect`.
+     * The symbol is not implemented in the class, and it cannot be implemented. For example, it's final in super classes.
      */
     CANNOT_BE_IMPLEMENTED;
 

core/descriptors/src/org/jetbrains/kotlin/resolve/DescriptorUtils.java

@@ -505,10 +505,6 @@ public class DescriptorUtils {
                UnsignedTypes.INSTANCE.isUnsignedType(type);
     }
 
-    public static boolean classCanHaveAbstractFakeOverride(@NotNull ClassDescriptor classDescriptor) {
-        return classCanHaveAbstractDeclaration(classDescriptor) || classDescriptor.isExpect();
-    }
-
     public static boolean classCanHaveAbstractDeclaration(@NotNull ClassDescriptor classDescriptor) {
         return classDescriptor.getModality() == Modality.ABSTRACT
                || isSealedClass(classDescriptor)