Travis: Remove make.py test for events and littlefs
Travis: Remove make.py test for events and littlefs

The removed tests were building applications from the content of their
respective README files. The events test was building with the full profile twice.
The first time with the repository as is; and the second time after deleting
some directories (to simulate the baremetal profile).
The littlefs test was building once with the full profile.

Testing make.py is no longer required as it is no longer supported.
There is already test coverage for APIs in the removed tests.

mbedmicro/mbed,mbedmicro/mbed,mbedmicro/mbed,mbedmicro/mbed,mbedmicro/mbed