Revert "Fix System.Object.GetCustomAttributes() returning extra internal attributes on Mono"

This reverts commit c5dc589.

Author: medhatiwari

src/mono/mono/metadata/custom-attrs.c

@@ -1822,36 +1822,6 @@ cattr_class_match (MonoClass *attr_klass, MonoClass *klass)
 		(m_class_is_gtd (attr_klass) && m_class_is_ginst (klass) && mono_class_is_assignable_from_internal (attr_klass, mono_class_get_generic_type_definition (klass)));
 }
 
-/*
- * Helper function to filter out internal/compiler-generated attributes
- * that should not be visible through reflection to match CoreCLR behavior
- */
-static gboolean
-should_filter_attribute_for_reflection (MonoMethod *ctor)
-{
-       MonoClass *attr_class = ctor->klass;
-       const char *attr_name = m_class_get_name (attr_class);
-       const char *attr_namespace = m_class_get_name_space (attr_class);
-
-       // Filter out these specific attributes from System.Object reflection
-       if (strcmp (attr_namespace, "System.Runtime.CompilerServices") == 0) {
-               if (strcmp (attr_name, "NullableContextAttribute") == 0 ||
-                   strcmp (attr_name, "TypeForwardedFromAttribute") == 0 ||
-		    strcmp (attr_name, "IsReadOnlyAttribute") == 0) {
-                       return TRUE;
-               }
-       }
-
-       if (strcmp (attr_namespace, "System.Runtime.InteropServices") == 0) {
-               if (strcmp (attr_name, "ClassInterfaceAttribute") == 0 ||
-                   strcmp (attr_name, "ComVisibleAttribute") == 0) {
-                       return TRUE;
-               }
-       }
-
-    return FALSE;
-}
-
 static MonoArrayHandle
 mono_custom_attrs_construct_by_type (MonoCustomAttrInfo *cinfo, MonoClass *attr_klass, MonoError *error)
 {
@@ -1877,24 +1847,11 @@ mono_custom_attrs_construct_by_type (MonoCustomAttrInfo *cinfo, MonoClass *attr_
 		for (i = 0; i < cinfo->num_attrs; ++i) {
 			MonoMethod *ctor = cinfo->attrs[i].ctor;
 			g_assert (ctor);
-			if (cattr_class_match (attr_klass, ctor->klass)) {
-				// Apply filtering for System.Object attributes
-				if (should_filter_attribute_for_reflection (ctor)) {
-					continue; // Skip this attribute
-				}
+			if (cattr_class_match (attr_klass, ctor->klass))
 				n++;
-			}
 		}
 	} else {
-		// Count attributes while applying filtering
-		for (i = 0; i < cinfo->num_attrs; ++i) {
-			MonoMethod *ctor = cinfo->attrs[i].ctor;
-			g_assert (ctor);
-			// Apply filtering for System.Object attributes
-			if (!should_filter_attribute_for_reflection (ctor)) {
-				n++;
-			}
-		}
+		n = cinfo->num_attrs;
 	}
 
 	result = mono_array_new_cached_handle (mono_defaults.attribute_class, n, error);
@@ -1903,10 +1860,6 @@ mono_custom_attrs_construct_by_type (MonoCustomAttrInfo *cinfo, MonoClass *attr_
 	for (i = 0; i < cinfo->num_attrs; ++i) {
 		MonoCustomAttrEntry *centry = &cinfo->attrs [i];
 		if (!attr_klass || cattr_class_match (attr_klass, centry->ctor->klass)) {
-			// Apply filtering for System.Object attributes
-			if (should_filter_attribute_for_reflection (centry->ctor)) {
-				continue; // Skip this attribute
-			}
 			create_custom_attr_into_array (cinfo->image, centry->ctor, centry->data,
 				centry->data_size, result, n, error);
 			goto_if_nok (error, exit);