refactor: no need check TtlEnhanced type in `CffuTtlExecutorWrapper…

…Provider`

already done in `TtlExecutors.getTtlExecutor`

cffu-ttl-executor-wrapper/src/main/java/io/foldright/cffu/ttl/CffuTtlExecutorWrapperProvider.java

@@ -1,6 +1,5 @@
 package io.foldright.cffu.ttl;
 
-import com.alibaba.ttl.spi.TtlEnhanced;
 import com.alibaba.ttl.threadpool.TtlExecutors;
 import edu.umd.cs.findbugs.annotations.NonNull;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
@@ -24,8 +23,6 @@ public final class CffuTtlExecutorWrapperProvider implements ExecutorWrapperProv
     @Override
     @SuppressFBWarnings("NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE")
     public Executor wrap(@NonNull Executor executor) {
-        requireNonNull(executor, "executor is null");
-        if (executor instanceof TtlEnhanced) return executor;
-        return TtlExecutors.getTtlExecutor(executor);
+        return TtlExecutors.getTtlExecutor(requireNonNull(executor, "executor is null"));
     }
 }