Remove a spurious test-network-all warning that triggers when sh is not bash

Part of 21581.

Makefile.am

@@ -137,9 +137,6 @@ test-network-all: need-chutney-path test-driver $(TESTING_TOR_BINARY) src/tools/
 	for f in $$flavors; do \
 		$(SHELL) $(top_srcdir)/test-driver --test-name $$f --log-file $(TEST_NETWORK_ALL_LOG_DIR)/$$f.log --trs-file $(TEST_NETWORK_ALL_LOG_DIR)/$$f.trs $(TEST_NETWORK_ALL_DRIVER_FLAGS) $(top_srcdir)/src/test/test-network.sh --flavor $$f $(TEST_NETWORK_FLAGS); \
 		$(top_srcdir)/src/test/test-network.sh $(TEST_NETWORK_WARNING_FLAGS); \
-		if test $$? -eq 2 ; then \
-			echo "Please update your chutney using 'git pull' to see tor warnings here."; \
-		fi; \
 	done; \
 	echo "Log and result files are available in $(TEST_NETWORK_ALL_LOG_DIR)."; \
 	! grep -q FAIL test_network_log/*.trs