diff --git a/gotip/main.go b/gotip/main.go
index bad0210..6338234 100644
--- a/gotip/main.go
+++ b/gotip/main.go
@@ -18,7 +18,6 @@
 	"errors"
 	"fmt"
 	"log"
-	"net/http"
 	"os"
 	"os/exec"
 	"os/user"
@@ -27,10 +26,6 @@
 	"strings"
 )
 
-func init() {
-	http.DefaultTransport = &userAgentTransport{http.DefaultTransport}
-}
-
 func main() {
 	log.SetFlags(0)
 
@@ -186,15 +181,6 @@
 	}
 }
 
-type userAgentTransport struct {
-	rt http.RoundTripper
-}
-
-func (uat userAgentTransport) RoundTrip(r *http.Request) (*http.Response, error) {
-	r.Header.Set("User-Agent", "golang-x-build-version/devel")
-	return uat.rt.RoundTrip(r)
-}
-
 // dedupEnv returns a copy of env with any duplicates removed, in favor of
 // later values.
 // Items are expected to be on the normal environment "key=value" form.