postgresql: remove globin and ivan from maintainers

No response for 3 weeks to:
NixOS#352905 (comment)

pkgs/servers/sql/postgresql/generic.nix

@@ -297,7 +297,7 @@ let
       description = "Powerful, open source object-relational database system";
       license     = licenses.postgresql;
       changelog   = "https://www.postgresql.org/docs/release/${finalAttrs.version}/";
-      maintainers = with maintainers; [ globin ivan ] ++ teams.postgres.members;
+      maintainers = with maintainers; teams.postgres.members;
       pkgConfigModules = [ "libecpg" "libecpg_compat" "libpgtypes" "libpq" ];
       platforms   = platforms.unix;