Revert "CM11 Themes: Allow defining a custom default theme [2/3]"

This reverts commit 8ff5a8cd6aa1fe64a1f3ee63cade6ed8d8acc439.
Revert "Themes: Support launcher based icon packs [2/2]"

This reverts commit 4456de181af115c60aac4696639dc70e162882ce.