refact: remove unused imports

Author: sebthom

org.eclipse.tm4e.core/src/test/java/org/eclipse/tm4e/core/internal/parser/TMParserTest.java

@@ -24,11 +24,9 @@
 import java.nio.file.SimpleFileVisitor;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.Collection;
-import java.util.List;
 import java.util.Set;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import org.eclipse.jdt.annotation.NonNullByDefault;
 import org.eclipse.jdt.annotation.Nullable;
 import org.eclipse.tm4e.core.Data;
 import org.eclipse.tm4e.core.internal.grammar.raw.IRawRule;