deleted some unneeded imports

src/tests/praktikumHolonsTestCanvasController.java

@@ -1,11 +1,9 @@
 package tests;
 
-import static org.junit.Assert.*;
-import static org.junit.Assert.fail;
+import static org.junit.Assert.assertTrue;
 
 import org.junit.Before;
 import org.junit.Test;
-import com.sun.xml.internal.ws.policy.spi.AssertionCreationException;
 
 import classes.CpsEdge;
 import classes.CpsObject;