remove gorilla/rpc replacement (#8852)

go.mod

@@ -39,7 +39,7 @@ require (
 	github.com/gopherjs/gopherjs v0.0.0-20190328170749-bb2674552d8f // indirect
 	github.com/gorilla/handlers v1.4.0
 	github.com/gorilla/mux v1.7.0
-	github.com/gorilla/rpc v1.2.0+incompatible
+	github.com/gorilla/rpc v1.2.0
 	github.com/gorilla/websocket v1.4.1 // indirect
 	github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190118093823-f849b5445de4 // indirect
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 // indirect
@@ -99,7 +99,7 @@ require (
 	github.com/soheilhy/cmux v0.1.4 // indirect
 	github.com/streadway/amqp v0.0.0-20190404075320-75d898a42a94
 	github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 // indirect
-	github.com/ugorji/go v1.1.5-pre // indirect
+	github.com/ugorji/go/codec v1.1.5-pre // indirect
 	github.com/valyala/tcplisten v0.0.0-20161114210144-ceec8f93295a
 	github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 // indirect
 	go.etcd.io/bbolt v1.3.3 // indirect
@@ -120,6 +120,3 @@ require (
 	gopkg.in/olivere/elastic.v5 v5.0.80
 	gopkg.in/yaml.v2 v2.2.4
 )
-
-// Added for go1.13 migration https://github.com/golang/go/issues/32805
-replace github.com/gorilla/rpc v1.2.0+incompatible => github.com/gorilla/rpc v1.2.0