Remove all perl scripts from Tools/Scripts

Tools/Scripts/webkitpy/common/system/executive.py

 # Copyright (c) 2009, Google Inc. All rights reserved.
 # Copyright (c) 2009 Apple Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 112 matching lines @@
     def interpreter_for_script(script_path, fs=None):
         fs = fs or FileSystem()
         lines = fs.read_text_file(script_path).splitlines()
         if not len(lines):
             return None
         first_line = lines[0]
         if not first_line.startswith('#!'):
             return None
         if first_line.find('python') > -1:
             return sys.executable
-        if first_line.find('perl') > -1:
-            return 'perl'
         if first_line.find('ruby') > -1:
             return 'ruby'
         return None
 
     @staticmethod
     def shell_command_for_script(script_path, fs=None):
         fs = fs or FileSystem()
         # Win32 does not support shebang. We need to detect the interpreter ourself.
         if sys.platform == 'win32':
             interpreter = Executive.interpreter_for_script(script_path, fs)
@@ skipping 309 matching lines @@
             pool.close()
             pool.join()
 
 
 def _run_command_thunk(cmd_line_and_cwd):
     # Note that this needs to be a bare module (and hence Picklable) method to work with multiprocessing.Pool.
     (cmd_line, cwd) = cmd_line_and_cwd
     proc = subprocess.Popen(cmd_line, cwd=cwd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     stdout, stderr = proc.communicate()
     return (proc.returncode, stdout, stderr)