Remove newly added assert for testing

Change-Id: I2f518731bfdc802dd4352ae98a218fcbfeeebe0a
diff --git a/src/main/java/com/android/tools/r8/graph/AppServices.java b/src/main/java/com/android/tools/r8/graph/AppServices.java
index b275581..b5b0c60 100644
--- a/src/main/java/com/android/tools/r8/graph/AppServices.java
+++ b/src/main/java/com/android/tools/r8/graph/AppServices.java
@@ -123,7 +123,6 @@
         if (implementationClass != null
             && classToFeatureSplitMap.isInFeature(
                 implementationClass, appView.getSyntheticItems())) {
-          assert false;
           return true;
         }
       }