Fix VENV temporary path

Remove wrong setup of temporary path. mktemp creates the directory in
/tmp, so no need to add current directory to it.

Change-Id: Ie8e9ed90d1bb038a877ff9caf6d2d339f04766f0

jenkins/scripts/common_translation_update.sh

@@ -54,8 +54,6 @@ function setup_venv {
     # Note that this directory needs to be outside of the source tree,
     # some other functions will fail if it's inside.
     VENV=$(mktemp -d)
-    # Create absolute path here, we might change directories later.
-    VENV="$(pwd)/$VENV"
     trap "rm -rf $VENV" EXIT
     virtualenv $VENV