remove gorilla mux (#1411)

go.mod

@@ -32,7 +32,6 @@ require (
 	github.com/google/go-cmp v0.5.9
 	github.com/google/go-github/v42 v42.0.0
 	github.com/googleapis/gax-go/v2 v2.11.0
-	github.com/gorilla/mux v1.8.0
 	github.com/hashicorp/go-retryablehttp v0.7.4
 	github.com/jlaffaye/ftp v0.1.0
 	github.com/joho/godotenv v1.5.1

go.sum

@@ -254,8 +254,6 @@ github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+
 github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5mhpdKc/us6bOk=
 github.com/googleapis/gax-go/v2 v2.11.0 h1:9V9PWXEsWnPpQhu/PeQIkS4eGzMlTLGgt80cUUI8Ki4=
 github.com/googleapis/gax-go/v2 v2.11.0/go.mod h1:DxmR61SGKkGLa2xigwuZIQpkCI2S5iydzRfb3peWZJI=
-github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
-github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
 github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
 github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 h1:2VTzZjLZBgl62/EtslCrtky5vbi9dd7HrQPQIx6wqiw=

main.go

@@ -13,7 +13,6 @@ import (
 
 	"github.com/felixge/fgprof"
 	"github.com/go-logr/logr"
-	"github.com/gorilla/mux"
 	"github.com/jpillora/overseer"
 	"gopkg.in/alecthomas/kingpin.v2"
 
@@ -202,9 +201,9 @@ func run(state overseer.State) {
 
 	if *profile {
 		go func() {
-			router := mux.NewRouter()
-			router.PathPrefix("/debug/pprof").Handler(http.DefaultServeMux)
-			router.PathPrefix("/debug/fgprof").Handler(fgprof.Handler())
+			router := http.NewServeMux()
+			router.Handle("/debug/pprof", http.DefaultServeMux)
+			router.Handle("/debug/fgprof", fgprof.Handler())
 			logger.Info("starting pprof and fgprof server on :18066 /debug/pprof and /debug/fgprof")
 			if err := http.ListenAndServe(":18066", router); err != nil {
 				logger.Error(err, "error serving pprof and fgprof")