remove semicolon that Eclipse thinks is compile error (#5353)

Author: davidmoten

src/test/java/rx/internal/operators/SingleOperatorCastTest.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 package rx.internal.operators;
-;
+
 import org.junit.Test;
 import rx.Observer;
 import rx.Single;