warning fixes

Author: rbri

src/test/java/org/htmlunit/BrowserVersionTest.java

@@ -15,10 +15,8 @@
 package org.htmlunit;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertNotSame;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.util.TimeZone;
 

src/test/java/org/htmlunit/css/StyleAttributesTest.java

@@ -23,7 +23,6 @@
 import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
-import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import org.htmlunit.css.StyleAttributes.Definition;

src/test/java/org/htmlunit/general/huge/HostParentOf.java

@@ -23,7 +23,6 @@
 import org.htmlunit.TestCaseTest;
 import org.htmlunit.WebDriverTestCase;
 import org.htmlunit.junit.annotation.Alerts;
-import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;