Drop Windows support

gns3server/utils/__init__.py

@@ -89,14 +89,3 @@ def parse_version(version):
             version.append("000000")
         version.append("final")
     return tuple(version)
-
-
-def shlex_quote(s):
-    """
-    Compatible shlex_quote to handle case where Windows needs double quotes around file names, not single quotes.
-    """
-
-    if sys.platform.startswith("win"):
-        return s if re.match(r"^[-_\w./]+$", s) else '"%s"' % s.replace('"', '\\"')
-    else:
-        return shlex.quote(s)