Revert "EBookBackendGoogle: Make room for other authorizers."
Revert "EBookBackendGoogle: Make room for other authorizers."

This reverts commit a5dae1a780f898ab453f574440ca02e108b4ebef.

Actually no, don't want to do that.  Misread the code.

Distrotech/evolution-data-server,Distrotech/evolution-data-server,tintou/evolution-data-server,tintou/evolution-data-server,tintou/evolution-data-server,Distrotech/evolution-data-server,matzipan/evolution-data-server,Distrotech/evolution-data-server,matzipan/evolution-data-server,matzipan/evolution-data-server,tintou/evolution-data-server,Distrotech/evolution-data-server,matzipan/evolution-data-server,matzipan/evolution-data-server