Refactor: condense if clause

Author: liamhuber

pyiron_workflow/mixin/semantics.py

@@ -65,12 +65,11 @@ def parent(self, new_parent: SemanticParent | None) -> None:
             # Exit early if nothing is changing
             return
 
-        if new_parent is not None:
-            if not isinstance(new_parent, SemanticParent):
-                raise ValueError(
-                    f"Expected None or a {SemanticParent.__name__} for the parent of "
-                    f"{self.label}, but got {new_parent}"
-                )
+        if new_parent is not None and not isinstance(new_parent, SemanticParent):
+            raise ValueError(
+                f"Expected None or a {SemanticParent.__name__} for the parent of "
+                f"{self.label}, but got {new_parent}"
+            )
 
         if (
             self._parent is not None