Revert "Make torch shutdown by camera usage work properly."

This reverts commit 8cf0b8bbc8bd8b44a348c6859084930f67088795.
Revert "Torch: signal to framework TorchService not to kill us"

This reverts commit b7d5f5d1c096d5dec32af5d4255d8cfcfe9ca416.
Revert "Torch: Allow torch to be toggled off without knowledge of state"

This reverts commit 03a393fde6f1abacce0cd46237972d91e6375ead.