[tools][cts] Remove debug spam

This was never mean to be checked in, and is filling the cts roller logs with debug text

Change-Id: Icb01ea4afa94e81a58b0f3df6cdb2430fee70f8d
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/182261
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Auto-Submit: Ben Clayton <bclayton@google.com>
diff --git a/tools/src/cts/expectations/update.go b/tools/src/cts/expectations/update.go
index fa0401b..0f7a62d 100644
--- a/tools/src/cts/expectations/update.go
+++ b/tools/src/cts/expectations/update.go
@@ -519,7 +519,6 @@
 	if !out.Contains(keyOf(in)) && len(expectations) == 0 {
 		switch {
 		case somePass && someConsumed:
-			fmt.Println("\n", strings.Join(out.Keys(), "\n"))
 			u.diag(Note, in.Line, "expectation is partly covered by previous expectations and the remaining tests all pass")
 		case someConsumed:
 			u.diag(Note, in.Line, "expectation is fully covered by previous expectations")