ART: Simplify test 913

To work around unexpected GCs popping up and influencing this
not-very-robust test.

Bug: 32516268
Test: m test-art-host-run-test-913-heaps
Change-Id: I9ba831718de5487f01245238c30449e048e38ff2
diff --git a/test/913-heaps/expected.txt b/test/913-heaps/expected.txt
index a127f4e..77791a4 100644
--- a/test/913-heaps/expected.txt
+++ b/test/913-heaps/expected.txt
@@ -1,4 +1,2 @@
 ---
-false false
----
 true true
diff --git a/test/913-heaps/src/Main.java b/test/913-heaps/src/Main.java
index 2cc9c3a..4d77a48 100644
--- a/test/913-heaps/src/Main.java
+++ b/test/913-heaps/src/Main.java
@@ -33,7 +33,6 @@
 
   private static void run() {
     clearStats();
-    printStats();
     forceGarbageCollection();
     printStats();
   }