Use more 'tmux-test' functions

tests/helpers/resurrect_helpers.sh

@@ -1,9 +1,3 @@
-install_tmux_resurrect_helper() {
-	local plugin_path="${HOME}/.tmux/plugins/tmux-resurrect/"
-	rm -rf "$plugin_path"
-	git clone --recursive "${CURRENT_DIR}/../" "$plugin_path" >/dev/null 2>&1
-}
-
 # we want "fixed" dimensions no matter the size of real display
 set_screen_dimensions_helper() {
 	stty cols 200