diff --git a/core/src/main/java/jenkins/util/java/JavaUtils.java b/core/src/main/java/jenkins/util/java/JavaUtils.java
index 9bc3aa8fa5..30d43f8ed2 100644
--- a/core/src/main/java/jenkins/util/java/JavaUtils.java
+++ b/core/src/main/java/jenkins/util/java/JavaUtils.java
@@ -40,24 +40,6 @@ public class JavaUtils {
         // Cannot construct
     }
 
-    /**
-     * Check whether the current JVM is running with Java 8 or below
-     * @return {@code true} if it is Java 8 or older version
-     */
-    public static boolean isRunningWithJava8OrBelow() {
-        String javaVersion = getCurrentRuntimeJavaVersion();
-        return javaVersion.startsWith("1.");
-    }
-
-    /**
-     * Check whether the current JVM is running with Java 9 or above.
-     * @return {@code true} if it is Java 9 or above
-     */
-    public static boolean isRunningWithPostJava8() {
-        String javaVersion = getCurrentRuntimeJavaVersion();
-        return !javaVersion.startsWith("1.");
-    }
-
     /**
      * Returns the JVM's current version as a {@link VersionNumber} instance.
      */
diff --git a/core/src/test/java/jenkins/util/java/JavaUtilsTest.java b/core/src/test/java/jenkins/util/java/JavaUtilsTest.java
deleted file mode 100644
index 31a517d3fe..0000000000
--- a/core/src/test/java/jenkins/util/java/JavaUtilsTest.java
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * The MIT License
- *
- * Copyright (c) 2018 CloudBees, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-package jenkins.util.java;
-
-import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-import static org.junit.jupiter.api.Assumptions.assumeFalse;
-import static org.junit.jupiter.api.Assumptions.assumeTrue;
-
-import org.junit.jupiter.api.Test;
-import org.jvnet.hudson.test.For;
-
-@For(JavaUtils.class)
-class JavaUtilsTest {
-
-    @Test
-    void verifyJava8() {
-        assumeTrue(System.getProperty("java.version").startsWith("1."), "Test is for Java 8 only");
-        assertFalse(JavaUtils.isRunningWithPostJava8(), "isRunningWithPostJava8() should return false on Java 8 and below");
-    }
-
-    @Test
-    void verifyPostJava8() {
-        assumeFalse(System.getProperty("java.version").startsWith("1."), "Test is for Java 9+ only");
-        assertTrue(JavaUtils.isRunningWithPostJava8(), "isRunningWithPostJava8() should return true on Java 9 and above");
-    }
-}