Merge pull request #4297 from abhinav-upadhyay/unreachable-code

Remove an unreachable return statement.

IPython/core/magics/basic.py

@@ -341,7 +341,6 b' Currently the magic system has the following functions:""",'
         if not new_scheme:
             raise UsageError(
                 "%colors: you must specify a color scheme. See '%colors?'")
-            return
         # local shortcut
         shell = self.shell