Fix double file opening. (#18)

This fixes call to pendulum.now() (without arguments) which raised TypeError.

Author: yggdr

pendulum/tz/local_timezone.py

@@ -141,11 +141,11 @@ def get_tz_name_for_unix(cls):
 
             if not os.path.exists(tzpath):
                 continue
-            with open(tzpath, 'rb') as tzfile:
-                return Timezone('', *Parser.parse(tzfile))
+            return Timezone('', *Parser.parse(tzpath))
 
         raise RuntimeError('Can not find any timezone configuration')
 
+
 def _tz_from_env(tzenv):
     if tzenv[0] == ':':
         tzenv = tzenv[1:]