remove not used code

Signed-off-by: Attila Mészáros <[email protected]>

Author: csviri

Diff for: operator-framework-core/src/main/java/io/javaoperatorsdk/operator/api/reconciler/PrimaryUpdateAndCacheUtils.java

@@ -117,14 +117,6 @@ public static <P extends HasMetadata> P patchAndCacheStatus(
     return updatedResource;
   }
 
-  private static <P extends HasMetadata> void checkResourceVersionPresent(P primary) {
-    if (primary.getMetadata().getResourceVersion() == null) {
-      throw new IllegalStateException(
-          "Primary resource version is null, it is expected to set resource version for updates for caching. Name: %s namespace: %s"
-              .formatted(primary.getMetadata().getName(), primary.getMetadata().getNamespace()));
-    }
-  }
-
   private static <P extends HasMetadata> void logWarnIfResourceVersionPresent(P primary) {
     if (primary.getMetadata().getResourceVersion() != null) {
       log.warn(