Remove unused import

jplag.frontend.rust/src/test/java/de/jplag/rust/RustFrontendTest.java

@@ -9,7 +9,6 @@ import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.IntStream;
-import java.util.stream.StreamSupport;
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;