Removes warning from Pendulum.format()

Author: sdispater

pendulum/pendulum.py

@@ -899,11 +899,6 @@ def format(self, fmt, locale=None, formatter=None):
         :rtype: str
         """
         if formatter is None:
-            message = 'format() will default to the [alternative] formatter ' \
-                      'in the next major version. If you want to keep ' \
-                      'the current behavior in the future add the "formatter" ' \
-                      'keyword argument: format(formatter=\'classic\')'
-            warnings.warn(message, DeprecationWarning, 2)
             formatter = 'classic'
 
         if formatter not in FORMATTERS: