postgresqlPackages: remove compat with postgresql_11

pkgs/servers/sql/postgresql/ext/age.nix

···
     "14" = "sha256-w93Q499sZRk4q85A9yqKQjGUd9Pl8UL8K1D3W7mHRTU=";
     "13" = "sha256-Sot7FR0oW7kWA680pNCMCmlflu4RfJTSWZn9mrXrpzw=";
     "12" = "sha256-XezcXoHHLCD1/2OHmKhxome2pdjOsYAfZlpvOoU3aS4=";
-    "11" = "sha256-ZkNAIMO69BxF3knQ+jcUBVuDgcoZXZccF5O+acpZ81M=";
   };
 in
 stdenv.mkDerivation rec {

pkgs/servers/sql/postgresql/ext/pg_hint_plan.nix

···
       version = "1.3.9";
       hash = "sha256-64/dlm6e4flCxMQ8efsxfKSlja+Tko0zsghTgLatN+Y=";
     };
-    "11" = {
-      version = "1.3.9";
-      hash = "sha256-8t/HhB/2Kjx4xMItmmKv3g9gba5VCBHdplYtYD/3UhA=";
-    };
   }.${lib.versions.major postgresql.version} or (throw "Source for pg_hint_plan is not available for ${postgresql.version}");
 in
 stdenv.mkDerivation {

pkgs/servers/sql/postgresql/ext/pgaudit.nix

···
       version = "1.4.3";
       hash = "sha256-c8/xUFIHalu2bMCs57DeylK0oW0VnQwmUCpdp+tYqk4=";
     };
-    "11" = {
-      version = "1.3.4";
-      hash = "sha256-UEnwD36ejeYWyKRHZ4mPt6/Ru76Gy8s/rgIvmgermiM=";
-    };
   }.${lib.versions.major postgresql.version} or (throw "Source for pgaudit is not available for ${postgresql.version}");
 in
 stdenv.mkDerivation {

pkgs/servers/sql/postgresql/ext/pipelinedb.nix

···
     license = licenses.asl20;
     platforms = postgresql.meta.platforms;
     maintainers = [ maintainers.marsam ];
-    broken = versions.major postgresql.version != "11";
   };
 }