The servers do not have ImageMagick installed right now, breaking the automated builds. Revert this for now. This reverts the following commits:840e781408bootanim: Use a for loop to make part# foldersce5405d1f7Fix wrong bootanimation.zip from mkdir .../part{0..2}6179d9494fcm: Build bootanimation.zip67ddf37281cm: Rework boot animation generation Change-Id: I63fc43da9b1a6afea5f791e879f0bfc9a385d98d