All methods are valid now

requests/__init__.py

@@ -30,5 +30,5 @@ from .status_codes import codes
 from .config import settings
 from .exceptions import (
     RequestException, AuthenticationError, Timeout, URLRequired,
-    InvalidMethod, TooManyRedirects
+    TooManyRedirects
 )

requests/exceptions.py

@@ -12,15 +12,12 @@ class RequestException(Exception):
 
 class AuthenticationError(RequestException):
     """The authentication credentials provided were invalid."""
-    
+
 class Timeout(RequestException):
     """The request timed out."""
 
 class URLRequired(RequestException):
     """A valid URL is required to make a request."""
 
-class InvalidMethod(RequestException):
-    """An inappropriate method was attempted."""
-
 class TooManyRedirects(RequestException):
     """Too many redirects."""