iOS: remove unnecessary test for accelerometer available
iOS: remove unnecessary test for accelerometer available

The accelerometer is always available, so no need to check for
this.

Change-Id: I79411ff023c4350c5b31d4fad048484db2b2fe43
Reviewed-by: Thomas McGuire <2a8c2e178f359344f9cfed0db24d661e86eba971@kdab.com>
Reviewed-by: Lorn Potter <0e329dfd61bdd4e2b2b708a31f12f199a7656feb@jollamobile.com>

mer-qt/qtsensors,kobolabs/qtsensors,kobolabs/qtsensors,mer-qt/qtsensors,mer-qt/qtsensors,kobolabs/qtsensors,mer-qt/qtsensors,kobolabs/qtsensors,mer-qt/qtsensors