cmd/ejobs: update help output

The -e and -f flags were recently removed; this removes mentions
of them in the command help output for "ejobs results".

Change-Id: Id12044d5106f27209e27300f4aeb168bafa26477
Reviewed-on: https://go-review.googlesource.com/c/pkgsite-metrics/+/751180
Reviewed-by: Ethan Lee <ethanalee@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ethan Lee <ethanalee@google.com>

Author: madelinekalil

cmd/ejobs/main.go

@@ -95,7 +95,7 @@ var commands = []command{
 			fs.DurationVar(&waitInterval, "i", 0, "display updates at this interval")
 		},
 	},
-	{"results", "[-f] [-e] [-o FILE.json] [-stream] [-verbose] JOBID",
+	{"results", "[-o FILE.json] [-stream] [-verbose] JOBID",
 		"download results as JSON",
 		doResults,
 		func(fs *flag.FlagSet) {