FIX: returing nothign for preview assembly

Author: 9and3

src/gh/components/DF_preview_assembly/code.py

@@ -24,7 +24,6 @@ def RunScript(self, i_assembly: DFAssembly=None):
             return None
 
         self._dfassembly = i_assembly
-        return i_assembly.mass_center
 
     # Preview overrides
     def DrawViewportWires(self, args):