Remove duplicated lines

exercises/hello-world/build.gradle

@@ -16,9 +16,3 @@ test {
     events = ["passed", "failed", "skipped"]
   }
 }
-test {
-  testLogging {
-    exceptionFormat = 'full'
-    events = ["passed", "failed", "skipped"]
-  }
-}

exercises/hello-world/src/test/java/HelloWorldTest.java

@@ -1,6 +1,5 @@
 import org.junit.Test;
 import org.junit.Ignore;
-import org.junit.Ignore;
 
 import static org.junit.Assert.assertEquals;