Revert "Modules: clarify selection of GPS in airspeed algorithm"

This reverts commit 643daef1fc3b436f988fb8b63c318414728a2e2f.

Conflicts:
	ground/gcs/src/plugins/config/modules.ui
Merge pull request #815 from kubark42/revert-incorrect-gps-text

Revert "Modules: clarify selection of GPS in airspeed algorithm"