Remove JDK 25 from cross-version matrix

Since we're using JDK 25 in the main build anyway.

Author: marcphilipp

.github/workflows/cross-version.yml

@@ -27,8 +27,6 @@ jobs:
       fail-fast: false
       matrix:
         jdk:
-        - version: 25
-          type: ga
         - version: 26
           type: ea
         - version: 27