Merge pull request #4635 from Patater/mbed-can-do-timing-2.x

Backport 2.x: config: Allow Mbed to implement TIMING_C

Trivial backport, only one reviewer is ok.
diff --git a/.travis.yml b/.travis.yml
index 9b729ec..92090fb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,12 +28,6 @@
       script:
         - tests/scripts/all.sh -k test_full_cmake_gcc_asan
 
-    - name: macOS
-      os: osx
-      compiler: clang
-      script:
-        - tests/scripts/all.sh -k test_default_out_of_box
-
     - name: Windows
       os: windows
       before_install: