ci: remove testing for CockroachDB 24.2.x

Author: timgraham

.github/workflows/tests.yml

@@ -44,11 +44,6 @@ jobs:
             use_psycopg2: psycopg2
           - crdb-version: v24.1.5
             use_server_side_binding: server_side_binding
-          - crdb-version: v24.2.3
-          - crdb-version: v24.2.3
-            use_psycopg2: psycopg2
-          - crdb-version: v24.2.3
-            use_server_side_binding: server_side_binding
           - crdb-version: v24.3.2
           - crdb-version: v24.3.2
             use_psycopg2: psycopg2