Travis CI: Fix 'exclude pattern /usr is unused' lcov error

Author: ivmai

.travis.yml

@@ -626,7 +626,7 @@ script:
 after_success:
 - if [[ "$REPORT_COVERAGE" == true ]]; then
     lcov --capture --directory src --directory tests --output-file coverage.info;
-    lcov --remove coverage.info '/usr/*' 'tests/*' --output-file coverage.info;
+    lcov --remove coverage.info 'tests/*' --output-file coverage.info;
     lcov --list coverage.info;
     coveralls-lcov --repo-token=${COVERALLS_REPO_TOKEN} coverage.info;
   fi