CHROMIUM: trim chatty unmerge message

This message is always displayed to everyone all the time, and is
never anything else, and is doubtful anyone knows what it means.
Just trim it.

BUG=None
TEST=CQ passes

Change-Id: Ic465a288ca4b913be403ec56d2d65e351b2bc730
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/portage_tool/+/2994736
Tested-by: Mike Frysinger <vapier@chromium.org>
Auto-Submit: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Chris McDonald <cjmcdonald@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
diff --git a/lib/_emerge/unmerge.py b/lib/_emerge/unmerge.py
index 8923e20..f953b3e 100644
--- a/lib/_emerge/unmerge.py
+++ b/lib/_emerge/unmerge.py
@@ -287,7 +287,6 @@
 					# is protected, and the rest are selected
 		numselected = len(all_selected)
 		if global_unmerge and not numselected:
-			portage.writemsg_stdout("\n>>> No outdated packages were found on your system.\n")
 			return 1, {}
 	
 		if not numselected: