Tidy up imports

src/it/reactor-grpc-jvm-plugin/test.groovy

@@ -37,5 +37,4 @@ expectedGeneratedFiles.forEach {
   assertThat(classesDir.resolve("${it}.class"))
       .exists()
       .isNotEmptyFile()
-
 }

src/test/java/io/github/ascopes/protobufmavenplugin/platform/HostSystemTest.java

@@ -20,7 +20,6 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
-import static org.mockito.Mockito.withSettings;
 
 import java.io.File;
 import java.io.IOException;

src/test/java/io/github/ascopes/protobufmavenplugin/source/ProtoFilePredicatesTest.java

@@ -21,7 +21,6 @@
 
 import java.io.IOException;
 import java.nio.file.Files;
-import java.nio.file.Path;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;