Remove outdated statement from README

README.md

@@ -27,11 +27,7 @@ The package can be installed as:
   ```elixir
   def deps do
     [
-      {:grpc, "~> 0.7"},
-      # We don't force protobuf as a dependency for more
-      # flexibility on which protobuf library is used,
-      # but you probably want to use it as well
-      {:protobuf, "~> 0.11"}
+      {:grpc, "~> 0.8"}
     ]
   end
   ```