travis: Remove basic-5 from ci

.travis.yml

@@ -67,4 +67,3 @@ jobs:
         - pushd examples/tutorial/basic-2 && anchor test && popd
         - pushd examples/tutorial/basic-3 && anchor test && popd
         - pushd examples/tutorial/basic-4 && anchor test && popd
-        - pushd examples/tutorial/basic-5 && anchor test && popd