Revert r235548 "Add a Yo Dawg to wake up folks."

Internal teams are relying on git-try as the sole mean to run try jobs so revert
this.

Hopefully most target users (chromium folks) got the message at least once.

R=cmp@chromium.org
BUG=

Review URL: https://codereview.chromium.org/88743003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@237361 0039d316-1c4b-4281-b951-d872f2087c98

git-try

@@ -8,11 +8,6 @@
 OUTPUT="$(uname | grep 'MINGW')"
 MINGW=$?
 
-echo ''
-echo "Yo Dawg, are you sure you don't want git cl try?"
-echo 'Check it out!  http://goo.gl/mOxXEj'
-echo ''
-
 if [ $MINGW = 0 ]; then
   base_dir="${0%\\*}"
 else