cleanup, RTE: factor out scheduleCheck_pressure_reached_dive_mode_level The detection of the start of dive mode is conceptually simple (when the pressure sensor reaches a certain threshold, we are diving). This said, there are multiple implementations over the entire code base to answer the question: are we diving? This commit factors out scheduleCheck_pressure_reached_dive_mode_level used only in the RTE, in favor of is_ambient_pressure_close_to_surface, which is used in both RTE and CPU1 firmware. I had a little hope that is would fix the 1 second difference between the initial stopwatch and the divetime, but it does not. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>