Revert CM's brightness slider

After force enabling it on tablets and doing a side-by-side comparison..
CM's brightness slider is less effective than the one we had previously
which worked fine as it was and did not need to be changed.

commit b9c0d6027ce8b025484e07e1519607a0ee08c632
Author: PrimeDirective <activethrasher00@gmail.com>
Date:   Tue Jan 7 23:55:32 2014 -0500

    Revert "Revert "Update brightness slider code from aokp""

    This reverts commit 279335d84dbc90be6c8f175e3873e27b54d72875.

commit 63dfd34f42ab6a28ff1b9146eddb7508cf2fe4d3
Author: PrimeDirective <activethrasher00@gmail.com>
Date:   Tue Jan 7 23:55:19 2014 -0500

    Revert "Revert "systemui: add brightness slider 2/2""

    This reverts commit 234b4689df0b3c3d405dc154c0b7b458dcdc3bea.

commit 492f495708f00ff1f787a44bc47fe3918231e6ab
Author: PrimeDirective <activethrasher00@gmail.com>
Date:   Tue Jan 7 23:54:55 2014 -0500

    revert CM's brightness slider

    Change-Id: I071ef58bc4fd707ceefd14ee1ba4e29bbab22ea7

Change-Id: Id4d986e5adc0961fdc3ff880ec00371afa4e5df3
Merge "Revert CM's brightness slider" into kk44