Revert "Use CheckArmoredDetachedSignature to successfully verify signatures"
Revert "Use CheckArmoredDetachedSignature to successfully verify signatures"

Doing this caused new errors to crop up in other places.
Investigating the possibility that this might be a GPG version thing.

This reverts commit b79e52c8c645e18c5388fd7a29fe6ad3d98fca1a.

mozilla/mig,mozilla/mig,mozilla/mig,mozilla/mig,mozilla/mig