removed an extra newline. (I fixed these problems earlier, but my failed attempts at auto-linting and subsequent commands erased all that progress.)

Author: jewettaijfc

tidy3d/components/geometry/base.py

@@ -777,7 +777,6 @@ def pop_axis(
         axis : int
             Integer index into 'xyz' (0,1,2).
 
-
         Returns
         -------
         Any, Tuple[Any, Any]