Remove restriction that zip files must provide all images
diff --git a/lottie/src/main/java/com/airbnb/lottie/LottieCompositionFactory.java b/lottie/src/main/java/com/airbnb/lottie/LottieCompositionFactory.java
index b74bcb1..13b1194 100644
--- a/lottie/src/main/java/com/airbnb/lottie/LottieCompositionFactory.java
+++ b/lottie/src/main/java/com/airbnb/lottie/LottieCompositionFactory.java
@@ -554,13 +554,6 @@
       }
     }
 
-    // Ensure that all bitmaps have been set.
-    for (Map.Entry<String, LottieImageAsset> entry : composition.getImages().entrySet()) {
-      if (entry.getValue().getBitmap() == null) {
-        return new LottieResult<>(new IllegalStateException("There is no image for " + entry.getValue().getFileName()));
-      }
-    }
-
     if (cacheKey != null) {
       LottieCompositionCache.getInstance().put(cacheKey, composition);
     }