QtLocation: Remove unused forcesuccess/qt.tests.insignificant configurations

There is only a 'dev' branch being CI tested, and that branch already has
all the configurations in place.

Change-Id: I42b1f6561126cfd6ac46e106b56758676be62870
Reviewed-by: Simo Fält <simo.falt@digia.com>
QtLocation: Remove unused qt.configure.extra_args configuration

Is not clear why this was added. configure options should just be
inherited.

Change-Id: Ic27a45fd6ed228a51642c7048f2a903dc5759be4
Reviewed-by: Simo Fält <simo.falt@digia.com>
QtLocation: Remove CI configuration for 'master' branch

QtLocation has switched to use the dev/stable/release schema, so
the 'master' branch won't be in use anymore.

Change-Id: I2cd8e6f3a2ed20f666cd75ad0577d4b3995606e8
Reviewed-by: Simo Fält <simo.falt@digia.com>