Don't disable JIT

Reference: http://review.androidarmv6.org/#/c/6899/
Reference: http://review.androidarmv6.org/#/c/6900/
Reference: http://review.androidarmv6.org/#/c/6901/
Change-Id: I9e74c4ebfa054f7f2ff31479e1064b51f30d3957
Remove dalvik tweak

This is a duplicate property that is included in all template heap
configs. This is a RAM-specific tweak, so it doesn't belong here.

Change-Id: Ib0eaeee1f228fa9a4f65de478c84be2542e39fa8