rm redundant docstring for doc

stdlib/REPL/src/docview.jl

@@ -198,14 +198,6 @@ function insert_internal_warning(other, internal_access::Set{Pair{Module,Symbol}
     other
 end
 
-"""
-    Docs.doc(binding, sig)
-
-Return all documentation that matches both `binding` and `sig`.
-
-If `getdoc` returns a non-`nothing` result on the value of the binding, then a
-dynamic docstring is returned instead of one based on the binding itself.
-"""
 function doc(binding::Binding, sig::Type = Union{})
     if defined(binding)
         result = getdoc(resolve(binding), sig)