Remove outdated project from Community Docs (#3910)
Remove outdated project from Community Docs (#3910)

Razor pages community project has no content and is no longer active.
MienDev/IdentityServer4,IdentityServer/IdentityServer4,MienDev/IdentityServer4,MienDev/IdentityServer4,MienDev/IdentityServer4,IdentityServer/IdentityServer4,IdentityServer/IdentityServer4,IdentityServer/IdentityServer4