fix chcckstyle.

Author: zhtttylz

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSStripedInputStream.java

@@ -41,7 +41,6 @@
 import org.apache.hadoop.io.erasurecode.rawcoder.RawErasureDecoder;
 import org.apache.hadoop.test.GenericTestUtils;
 import org.junit.jupiter.api.AfterEach;
-import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
@@ -216,7 +215,7 @@ public void testPread() throws Exception {
       int ret = in.read(startOffset, buf, 0, fileLen);
       assertEquals(remaining, ret);
       for (int i = 0; i < remaining; i++) {
-        Assertions.assertEquals(expected[startOffset + i], buf[i],
+        assertEquals(expected[startOffset + i], buf[i],
             "Byte at " + (startOffset + i) + " should be the " + "same");
       }
     }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSUpgrade.java

@@ -24,6 +24,7 @@
 import static org.apache.hadoop.test.GenericTestUtils.assertExists;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
 
@@ -52,7 +53,6 @@
 import org.junit.jupiter.api.Timeout;
 
 import org.apache.hadoop.thirdparty.com.google.common.base.Joiner;
-import org.junit.jupiter.api.Assertions;
 
 /**
 * This test ensures the appropriate response (successful or failure) from
@@ -442,7 +442,7 @@ private void deleteStorageFilesWithPrefix(String[] nameNodeDirs, String prefix)
 
   @Test
   public void testUpgradeFromPreUpgradeLVFails() throws IOException {
-    Assertions.assertThrows(IOException.class, () -> {
+    assertThrows(IOException.class, () -> {
       Storage.checkVersionUpgradable(Storage.LAST_PRE_UPGRADE_LAYOUT_VERSION + 1);
       fail("Expected IOException is not thrown");
     });