Remove invalid asserts.

Change-Id: I342480d90368f55900418764522d56c6c7cc5022
diff --git a/src/main/java/com/android/tools/r8/ir/desugar/InterfaceMethodRewriter.java b/src/main/java/com/android/tools/r8/ir/desugar/InterfaceMethodRewriter.java
index 695576b..60cc444 100644
--- a/src/main/java/com/android/tools/r8/ir/desugar/InterfaceMethodRewriter.java
+++ b/src/main/java/com/android/tools/r8/ir/desugar/InterfaceMethodRewriter.java
@@ -293,11 +293,9 @@
             continue;
           }
           if (!clazz.isInterface()) {
-            assert !invokeSuper.isInterface;
             // Skip non-interface invokes.
             continue;
           }
-          assert invokeSuper.isInterface;
           if (!clazz.isLibraryClass()) {
             // For program and classpath retarget call to an appropriate method of companion class.
             DexMethod amendedMethod =