Remove auto translate comments from translation strings

Cleanup imports like https://review.opendev.org/684510, we do not need
these auto import information.

Change-Id: I32a8058064e231336455d45badb7bea1283ffce4

roles/prepare-zanata-client/files/common_translation_update.sh

@@ -711,6 +711,10 @@ function compress_po_files {
     local directory=$1
 
     for i in $(find $directory -name *.po) ; do
+        # Remove auto translated comments, those are not needed.
+        # Do this first since it introduces empty lines, the msgattrib
+        # remove them.
+        sed -e 's|^# auto translated by TM merge.*$||' -i $i
         msgattrib --translated --no-location --sort-output "$i" \
             --output="${i}.tmp"
         mv "${i}.tmp" "$i"