nixbld: remove gitea patch (merged upstream)

nixbld-etc-nixos/configuration.nix

@@ -513,14 +513,6 @@ in
     matterbridge = super.matterbridge.overrideAttrs(oa: {
       patches = oa.patches or [] ++ [ ./matterbridge-disable-github.patch ];
     });
-    gitea = super.gitea.overrideAttrs(oa: {
-      preBuild = let tagsString = "pam sqlite sqlite_unlock_notify"; in ''
-        export buildFlagsArray=(
-          -tags="${tagsString}"
-          -ldflags='-X "main.Version=${oa.version}" -X "main.Tags=${tagsString}"'
-        )
-      '';
-    });
   };
 
   security.acme.acceptTerms = true;