Revert "Libcore: Improve BaseDexClassLoader.toString"

This reverts commit 100fd826ec84a287719121fb6412156f0dfd2a53.

Reason for revert: Leads to infinite recursion in some apps (http://b/147481074)

Change-Id: If0137da17fc24ceb94dc378554651d68b4a25ae9
Bug: 147481074
diff --git a/dalvik/src/main/java/dalvik/system/BaseDexClassLoader.java b/dalvik/src/main/java/dalvik/system/BaseDexClassLoader.java
index 1c129e2..9cf5f80 100644
--- a/dalvik/src/main/java/dalvik/system/BaseDexClassLoader.java
+++ b/dalvik/src/main/java/dalvik/system/BaseDexClassLoader.java
@@ -330,14 +330,7 @@
     }
 
     @Override public String toString() {
-        String sharedLibs = "";
-        if (sharedLibraryLoaders != null) {
-            for (Object obj : sharedLibraryLoaders) {
-                sharedLibs += obj + ",";
-            }
-        }
-        return getClass().getName() + "[" + pathList + "; parent=(" + getParent()
-                + "), shared-libs=(" + sharedLibs + ")]";
+        return getClass().getName() + "[" + pathList + "]";
     }
 
     /**