etc: Remove old mklldef.py script

The compiler has since gained better support for this, so the script is no
longer necessary

src/etc/mklldef.py

@@ -1,25 +0,0 @@
-# Copyright 2015 The Rust Project Developers. See the COPYRIGHT
-# file at the top-level directory of this distribution and at
-# http://rust-lang.org/COPYRIGHT.
-#
-# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-# option. This file may not be copied, modified, or distributed
-# except according to those terms.
-
-import sys
-
-input_file = sys.argv[1]
-output_file = sys.argv[2]
-name = sys.argv[3]
-
-with open(input_file, 'r') as f:
-    with open(output_file, 'w') as g:
-        print >> g, 'LIBRARY ' + name
-        print >> g, 'EXPORTS'
-        for x in f:
-            x = str(x)
-            if not x.startswith('    pub fn LLVM'): continue
-            name = x[11:x.find('(')]
-            print >> g, '  ' + name