Revert "HALO: Option to pause the underlying app (2/2)"

This reverts commit 3946cbaf4b0b548804b222679f2fc3de694d5e0c.
Revert "Halo: Add master switch to disable Halo (2/2)"

This reverts commit c66f5b6754924d50000085eba8f1c5d06c2a9366.