all.bash: remove references to unused env vars

We don't use KMS or a secrets bucket anymore; we use Secret Manager.

Change-Id: I5afba05927dccb8efa6c0d76aec5380d30bb31cf
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/245920
Reviewed-by: Julie Qiu <julie@golang.org>
diff --git a/all.bash b/all.bash
index c66bb1f..e3fa642 100755
--- a/all.bash
+++ b/all.bash
@@ -176,8 +176,6 @@
       run_prettier
       runcmd go mod tidy
       runcmd env GO_DISCOVERY_TESTDB=true go test ./...
-      # To test internal/secrets, set GO_DISCOVERY_SECRETS_BUCKET and GO_DISCOVERY_KMS_KEY_NAME
-      # to appropriate test values.
       runcmd go test ./internal/secrets
       ;;
     ci)