Remove output from install_hooks script

The output was confusing users if the script ran successfully or not. So
it just runs silently now. If there is an error, then the commands
producing them will output to stderror.

Change-Id: Id12e95117d3421968549c24b2741bc859d1fcb8b

install_hooks.sh

diff --git a/install_hooks.sh b/install_hooks.sh
index 681e1a1..10463c4 100755
--- a/install_hooks.sh
+++ b/install_hooks.sh
@@ -20,18 +20,7 @@
     if [ "$hookConfigExists" -eq "0" ]; then
         git config --unset-all hook.${hook}.command
         git config --add hook.${hook}.command "${dir}/${hook}"
-        # There should be a single hook per line and it should point to the
-        # git-hooks repository.
-        git hook list "${hook}"
     else
         cp ${dir}/${hook} ${githookdir}/${hook}
     fi
 done
-
-if [ "$hookConfigExists" -eq "0" ]; then
-    echo "If a single command is listed per hook, then this script was succesful."
-    echo "Checks will be run at pre-submit."
-else
-    echo "The 'git hook' command is not available on this device."
-    echo "The hooks will be copied to ${githookdir}, but will not automatically remain up-to-date with the git-hooks repository"
-done