remove shebang from cli.py

We don't need shebang here cause there is the `__main__.py` file which allowed to run it as a script.

This doesn't directly interfere much, but I've encountered difficulties when my code tried to turn this module into a script (based on first line/shebang), although the file itself is not intended for this.

Author: artyrian

sqlparse/cli.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-#
 # Copyright (C) 2009-2020 the sqlparse authors and contributors
 # <see AUTHORS file>
 #