remove extra letter

Author: nuclearace

README.md

@@ -159,7 +159,7 @@ Methods
 12. `joinNamespace()` - Causes the client to join nsp. Shouldn't need to be called unless you change nsp manually.
 13. `leaveNamespace()` - Causes the client to leave the nsp and go back to /
 14. `off(event: String)` - Removes all event handlers for event.
-15. `removeAllHandlers()` - Removes all handlers.s
+15. `removeAllHandlers()` - Removes all handlers.
 
 Client Events
 ------