removed unused imports [ci skip]

main/frontend-webdav/src/test/java/org/cryptomator/frontend/webdav/filters/LoopbackFilterTest.java

@@ -17,14 +17,12 @@ import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-import org.junit.Assert;
 import org.junit.Assume;
 import org.junit.Before;
 import org.junit.experimental.theories.DataPoints;
 import org.junit.experimental.theories.Theories;
 import org.junit.experimental.theories.Theory;
 import org.junit.runner.RunWith;
-import org.mockito.ArgumentCaptor;
 import org.mockito.Mockito;
 
 @RunWith(Theories.class)