[drive-by] remove unhelpful source comment.

Author: fisx

servant/src/Servant/Links.hs

@@ -604,7 +604,6 @@ instance HasLink (Stream m status fr ct a) where
 instance HasLink (UVerb m ct a) where
     type MkLink (UVerb m ct a) r = r
     toLink toA _ = toA
--- Instance for NamedRoutes combinator
 
 type GLinkConstraints routes a =
   ( MkLink (ToServant routes AsApi) a ~ ToServant routes (AsLink a)