Revert "Watch for leaked ParcelFileDescriptors."

This reverts commit 062911b8a52e4c81c618b04aecba35a8b58bc1c5.
Revert "Two REMOVE_PROVIDER messages caused by race condition."

This reverts commit 76b4987d9ef694520af4c3f4d4ecd2f2c7cc34f6.