[Mod] Removed unnecessary function (#12772)

* Removed unnecessary function

the "renamedDocumentObjet" function does nothing

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

src/Mod/Spreadsheet/App/SheetObserver.cpp

@@ -70,9 +70,7 @@ void SheetObserver::slotDeletedObject(const DocumentObject& Obj)
 
 void SheetObserver::slotChangedObject(const DocumentObject& Obj, const Property& Prop)
 {
-    if (&Prop == &Obj.Label) {
-        sheet->renamedDocumentObject(&Obj);
-    }
+    if (&Prop == &Obj.Label) {}
     else {
         const char* name = Obj.getPropertyName(&Prop);