[An extra null pointer check is not needed in functions](https://isocpp.org/wiki/faq/freestore-mgmt#delete-handles-null) like the following. - [gps_handler](https://github.com/andybarry/flight/blob/58478bc1c305294a26e45a8e0f06dd8849bece9e/sensors/airspeed-check/airspeed-check.cpp#L119) - [RecordingManager](https://github.com/andybarry/flight/blob/58478bc1c305294a26e45a8e0f06dd8849bece9e/sensors/stereo/RecordingManager.cpp#L22) - [TransitionUndefinedException](https://github.com/andybarry/flight/blob/58478bc1c305294a26e45a8e0f06dd8849bece9e/externals/smc/lib/C%2B%2B/statemap.h#L275)
