Drop omniauth for openid_connect gem

Gemfile.lock

@@ -140,7 +140,6 @@ GEM
       raabro (~> 1.4)
     globalid (1.3.0)
       activesupport (>= 6.1)
-    hashie (5.0.0)
     httparty (0.23.2)
       csv
       mini_mime (>= 1.0.0)
@@ -234,14 +233,6 @@ GEM
       racc (~> 1.4)
     nokogiri (1.18.10-x86_64-linux-musl)
       racc (~> 1.4)
-    omniauth (2.1.4)
-      hashie (>= 3.4.6)
-      logger
-      rack (>= 2.2.3)
-      rack-protection
-    omniauth_openid_connect (0.8.0)
-      omniauth (>= 1.9, < 3)
-      openid_connect (~> 2.2)
     openid_connect (2.3.1)
       activemodel
       attr_required (>= 1.0.0)
@@ -293,10 +284,6 @@ GEM
       faraday-follow_redirects
       json-jwt (>= 1.11.0)
       rack (>= 2.1.0)
-    rack-protection (4.2.1)
-      base64 (>= 0.1.0)
-      logger (>= 1.6.0)
-      rack (>= 3.0.0, < 4)
     rack-session (2.1.1)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)
@@ -493,8 +480,6 @@ DEPENDENCIES
   jbuilder
   kamal
   maxmind-db
-  omniauth (~> 2.1)
-  omniauth_openid_connect (~> 0.8)
   openid_connect (~> 2.2)
   pagy
   pg (>= 1.1)