Delete morph v2 adjustements (#14158)

we need to handle both:

- morph relation field deletion ( implies every related morph and target
deletion )
- target RELATION only the pair that could contain a morph or not we
don't care


close https://github.com/twentyhq/core-team-issues/issues/1411

packages/twenty-server/src/engine/metadata-modules/flat-field-metadata/utils/from-delete-field-input-to-flat-field-metadatas-to-delete.util.ts

@@ -59,10 +59,6 @@ export const fromDeleteFieldInputToFlatFieldMetadatasToDelete = ({
     isFlatFieldMetadataEntityOfType(
       flatFieldMetadataToDelete,
       FieldMetadataType.RELATION,
-    ) &&
-    isFlatFieldMetadataEntityOfType(
-      flatFieldMetadataToDelete.flatRelationTargetFieldMetadata,
-      FieldMetadataType.RELATION,
     )
   ) {
     const relationTargetFlatFieldMetadata =
@@ -74,22 +70,5 @@ export const fromDeleteFieldInputToFlatFieldMetadatasToDelete = ({
     return [flatFieldMetadataToDelete, relationTargetFlatFieldMetadata];
   }
 
-  if (
-    isFlatFieldMetadataEntityOfType(
-      flatFieldMetadataToDelete,
-      FieldMetadataType.RELATION,
-    ) &&
-    isFlatFieldMetadataEntityOfType(
-      flatFieldMetadataToDelete.flatRelationTargetFieldMetadata,
-      FieldMetadataType.MORPH_RELATION,
-    )
-  ) {
-    return findFlatFieldMetadatasRelatedToMorphRelationOrThrow({
-      flatObjectMetadataMaps: existingFlatObjectMetadataMaps,
-      flatFieldMetadata:
-        flatFieldMetadataToDelete.flatRelationTargetFieldMetadata,
-    });
-  }
-
   return [flatFieldMetadataToDelete];
 };