Add support for clearing a message's reactions.

discord/client.py

@@ -1042,6 +1042,28 @@ class Client:
 
         return [User(**user) for user in data]
 
+    @asyncio.coroutine
+    def clear_reactions(self, message):
+        """|coro|
+
+        Removes all the reactions from a given message.
+
+        You need Manage Messages permission to use this.
+
+        Parameters
+        -----------
+        message: :class:`Message`
+            The message to remove all reactions from.
+
+        Raises
+        --------
+        HTTPException
+            Removing the reactions failed.
+        Forbidden
+            You do not have the proper permissions to remove all the reactions.
+        """
+        yield from self.http.clear_reactions(message.id, message.channel.id)
+
     @asyncio.coroutine
     def send_message(self, destination, content=None, *, tts=False, embed=None):
         """|coro|

discord/http.py

@@ -289,6 +289,10 @@ class HTTPClient:
             params['after'] = after
         return self.get(url, params=params, bucket='%s:%s' % (_func_(), channel_id))
 
+    def clear_reactions(self, message_id, channel_id):
+        url = '{0.CHANNELS}/{1}/messages/{2}/reactions'.format(self, channel_id, message_id)
+        return self.delete(url)
+
     def get_message(self, channel_id, message_id):
         url = '{0.CHANNELS}/{1}/messages/{2}'.format(self, channel_id, message_id)
         return self.get(url, bucket=_func_())