Fix lint issue

Author: planarvoid

aztec/src/test/kotlin/org/wordpress/aztec/AztecContentChangeWatcherTest.kt

@@ -1,6 +1,7 @@
 package org.wordpress.aztec
 
-import org.junit.Assert.*
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith