Revert "Re-enable travis checks for build warnings"

This reverts commit 47b69c4.

Author: m-kuhn

.ci/travis/linux/docker-build-test.sh

@@ -72,6 +72,20 @@ echo "travis_fold:end:cmake"
 TRAVIS_TIME=120
 UPLOAD_TIME=5
 CURRENT_TIME=$(date +%s)
+TIMEOUT=$((( TRAVIS_TIME - UPLOAD_TIME ) * 60 - CURRENT_TIME + TRAVIS_TIMESTAMP))
+TIMEOUT=$(( TIMEOUT < 300 ? 300 : TIMEOUT ))
+echo "Timeout: ${TIMEOUT}s (started at ${TRAVIS_TIMESTAMP}, current: ${CURRENT_TIME})"
+
+# echo "travis_fold:start:ninja-build.1"
+echo "${bold}Building QGIS...${endbold}"
+timeout ${TIMEOUT}s ${CTEST_BUILD_COMMAND}
+# echo "travis_fold:end:ninja-build.1"
+
+rv=$?
+if [ $rv -eq 124 ] ; then
+    printf '\n\n${bold}Build and test timeout. Please restart the build for meaningful results.${endbold}\n'
+    exit #$rv
+fi
 
 # Temporarily uncomment to debug ccache issues
 # echo "travis_fold:start:ccache-debug"