cmd/release: remove edge_kick_command

relui won't be able to run random commands. Once this CL is submitted,
I'll update the sync job to run every 10-30 seconds so that we don't
have to wait very long even without the poke, and remove it from our
internal documentation.

For golang/go#51797.

Change-Id: I58f3aeb509f42e7502b398c767d4873618e24e18
Reviewed-on: https://go-review.googlesource.com/c/build/+/394715
Trust: Heschi Kreinick <[email protected]>
Run-TryBot: Heschi Kreinick <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: heschi

cmd/release/release.go

@@ -48,7 +48,6 @@ var (
 	skipTests = flag.Bool("skip_tests", false, "skip tests; run make.bash but not all.bash (only use if sufficient testing was done elsewhere)")
 
 	uploadMode = flag.Bool("upload", false, "Upload files (exclusive to all other flags)")
-	uploadKick = flag.String("edge_kick_command", "", "Command to run to kick off an edge cache update")
 )
 
 var (

cmd/release/upload.go

@@ -15,8 +15,6 @@ import (
 	"math/rand"
 	"net/http"
 	"net/url"
-	"os"
-	"os/exec"
 	"path/filepath"
 	"regexp"
 	"sort"
@@ -132,18 +130,6 @@ func upload(files []string) error {
 }
 
 func waitForEdgeCache(uploaded []string) error {
-	if *uploadKick != "" {
-		args := strings.Fields(*uploadKick)
-		log.Printf("Running %v...", args)
-		cmd := exec.Command(args[0], args[1:]...)
-		cmd.Stdout = os.Stderr // Don't print to stdout.
-		cmd.Stderr = os.Stderr
-		// Don't wait for the command to finish.
-		if err := cmd.Start(); err != nil {
-			log.Printf("Couldn't start edge cache update command: %v", err)
-		}
-	}
-
 	var g errgroup.Group
 	for _, u := range uploaded {
 		fname := u