code cleanup

Author: adsharma

sqlmodel/main.py

@@ -593,10 +593,9 @@ def __init__(
     def sqlmodel_rebuild(cls) -> None:
         reg = cls._sa_registry
         # clear any exisiting mappers for the cls
-        manager = [m for m in reg._managers if m.class_ == cls]
-        if len(manager) > 0:
-            for m in manager:
-                reg._dispose_manager_and_mapper(m)
+        managers = [m for m in reg._managers if m.class_ == cls]
+        for m in managers:
+            reg._dispose_manager_and_mapper(m)
             del reg._managers[m]
 
         return cls.__do_init__(cls.__bases__, cls.__dict__, {})