Revert "Set Ruby to 2.x to fix Android deploy dependencies"
Revert "Set Ruby to 2.x to fix Android deploy dependencies"

This reverts commit aaf746d14739d40d1d4fb0f9ff72c132a8207490.

scott-eddy/qgroundcontrol,mihadyuk/qgroundcontrol,remspoor/qgroundcontrol,remspoor/qgroundcontrol,kd0aij/qgroundcontrol,catch-twenty-two/qgroundcontrol,kd0aij/qgroundcontrol,Hunter522/qgroundcontrol,Hunter522/qgroundcontrol,kd0aij/qgroundcontrol,cfelipesouza/qgroundcontrol,cfelipesouza/qgroundcontrol,CornerOfSkyline/qgroundcontrol,catch-twenty-two/qgroundcontrol,remspoor/qgroundcontrol,mihadyuk/qgroundcontrol,RedoXyde/PX4_qGCS,CornerOfSkyline/qgroundcontrol,RedoXyde/PX4_qGCS,scott-eddy/qgroundcontrol,RedoXyde/PX4_qGCS,remspoor/qgroundcontrol,catch-twenty-two/qgroundcontrol,kd0aij/qgroundcontrol,catch-twenty-two/qgroundcontrol,ethz-asl/qgc_asl,mihadyuk/qgroundcontrol,mihadyuk/qgroundcontrol,scott-eddy/qgroundcontrol,scott-eddy/qgroundcontrol,cfelipesouza/qgroundcontrol,CornerOfSkyline/qgroundcontrol,mihadyuk/qgroundcontrol,remspoor/qgroundcontrol,RedoXyde/PX4_qGCS,CornerOfSkyline/qgroundcontrol,Hunter522/qgroundcontrol,RedoXyde/PX4_qGCS,kd0aij/qgroundcontrol,ethz-asl/qgc_asl,cfelipesouza/qgroundcontrol,ethz-asl/qgc_asl,catch-twenty-two/qgroundcontrol,Hunter522/qgroundcontrol,cfelipesouza/qgroundcontrol,CornerOfSkyline/qgroundcontrol,catch-twenty-two/qgroundcontrol,Hunter522/qgroundcontrol,mihadyuk/qgroundcontrol,RedoXyde/PX4_qGCS,CornerOfSkyline/qgroundcontrol,cfelipesouza/qgroundcontrol,scott-eddy/qgroundcontrol,scott-eddy/qgroundcontrol,ethz-asl/qgc_asl,ethz-asl/qgc_asl,Hunter522/qgroundcontrol,remspoor/qgroundcontrol,kd0aij/qgroundcontrol