Remove PasswordEncoderUtils from core

Issue: gh-4674

core/src/test/java/org/springframework/security/authentication/encoding/PasswordEncoderUtilsTests.java

@@ -1,70 +0,0 @@
-/*
- * Copyright 2002-2016 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.security.authentication.encoding;
-
-import static org.assertj.core.api.Assertions.*;
-
-import org.junit.Test;
-
-/**
- * @author Rob Winch
- */
-public class PasswordEncoderUtilsTests {
-
-	@Test
-	public void equalsWhenDifferentLengthThenFalse() {
-		assertThat(PasswordEncoderUtils.equals("abc", "a")).isFalse();
-		assertThat(PasswordEncoderUtils.equals("a", "abc")).isFalse();
-	}
-
-	@Test
-	public void equalsWhenNullAndNotEmtpyThenFalse() {
-		assertThat(PasswordEncoderUtils.equals(null, "a")).isFalse();
-		assertThat(PasswordEncoderUtils.equals("a", null)).isFalse();
-	}
-
-	@Test
-	public void equalsWhenNullAndNullThenTrue() {
-		assertThat(PasswordEncoderUtils.equals(null, null)).isTrue();
-	}
-
-	@Test
-	public void equalsWhenNullAndEmptyThenFalse() {
-		assertThat(PasswordEncoderUtils.equals(null, "")).isFalse();
-		assertThat(PasswordEncoderUtils.equals("", null)).isFalse();
-	}
-
-	@Test
-	public void equalsWhenNotEmptyAndEmptyThenFalse() {
-		assertThat(PasswordEncoderUtils.equals("abc", "")).isFalse();
-		assertThat(PasswordEncoderUtils.equals("", "abc")).isFalse();
-	}
-
-	@Test
-	public void equalsWhenEmtpyAndEmptyThenTrue() {
-		assertThat(PasswordEncoderUtils.equals("", "")).isTrue();
-	}
-
-	@Test
-	public void equalsWhenDifferentCaseThenFalse() {
-		assertThat(PasswordEncoderUtils.equals("aBc", "abc")).isFalse();
-	}
-
-	@Test
-	public void equalsWhenSameThenTrue() {
-		assertThat(PasswordEncoderUtils.equals("abcdef", "abcdef")).isTrue();
-	}
-}