Update test to not keep interface expected to be removed

Change-Id: Ieefcfc09e7b3bc41b65c31dcc0350b463bd8e8d3

src/test/java/com/android/tools/r8/graph/genericsignature/GenericSignaturePrunedInterfacesKeepTest.java

diff --git a/src/test/java/com/android/tools/r8/graph/genericsignature/GenericSignaturePrunedInterfacesKeepTest.java b/src/test/java/com/android/tools/r8/graph/genericsignature/GenericSignaturePrunedInterfacesKeepTest.java
index 6d6b915..7cbbdf2 100644
--- a/src/test/java/com/android/tools/r8/graph/genericsignature/GenericSignaturePrunedInterfacesKeepTest.java
+++ b/src/test/java/com/android/tools/r8/graph/genericsignature/GenericSignaturePrunedInterfacesKeepTest.java
@@ -39,7 +39,8 @@
     testForR8(parameters.getBackend())
         .addInnerClasses(getClass())
         .setMinApi(parameters)
-        .addKeepAllClassesRule()
+        .addKeepMainRule(Main.class)
+        .addKeepClassRules(J.class, A.class, B.class)
         .addKeepAttributeSignature()
         .addKeepAttributeInnerClassesAndEnclosingMethod()
         .run(parameters.getRuntime(), Main.class)