refactor: Remove redundant null checks before instanceof

Use this link to re-run the recipe: https://app.moderne.io/recipes/org.openrewrite.staticanalysis.RemoveRedundantNullCheckBeforeInstanceof?organizationId=ODQ2MGExMTUtNDg0My00N2EwLTgzMGMtNGE1NGExMTBmZDkw

Co-authored-by: Moderne <[email protected]>

Author: timtebeek

src/main/java/org/openrewrite/java/testing/dbrider/ExecutionListenerToDbRiderAnnotation.java

@@ -206,7 +206,7 @@ private boolean canTestExecutionListenerBeRemoved() {
         }
 
         private @Nullable Expression getMigratedMergeMode() {
-            if (mergeMode != null && mergeMode instanceof J.FieldAccess && "REPLACE_DEFAULTS".equals(((J.FieldAccess) mergeMode).getName().getSimpleName())) {
+            if (mergeMode instanceof J.FieldAccess && "REPLACE_DEFAULTS".equals(((J.FieldAccess) mergeMode).getName().getSimpleName())) {
                 return null;
             }
             return mergeMode;