Revert "Attempted fix for released copy of usr->HAMK causing crash"

This reverts commit 718f18c64a4ab4311311dc4f02197ea25874a4af.
Revert "Temporary fix to check if usr->HAMK == NULL when authenticating"

This reverts commit 2e3bc805e157b74a0e87868c263c5931af2775b3.