Revert "Launcher3: Icon pack support"

This reverts commit a79383933be5de2d40688435da7e6b1b51c49a34.
Revert "Allow some customization in Launcher3"

This reverts commit 8b2cccb3b7bd9b7b1ffaba26ba43ff21b1dd154e.

Conflicts:
	res/values-af/cm_strings.xml