--- a/xpcom/base/nsCycleCollector.cpp
+++ b/xpcom/base/nsCycleCollector.cpp
@@ -1132,17 +1132,16 @@ struct nsCycleCollector
 
     nsPurpleBuffer mPurpleBuf;
 
     CC_BeforeUnlinkCallback mBeforeUnlinkCB;
     CC_ForgetSkippableCallback mForgetSkippableCB;
 
     void RegisterRuntime(PRUint32 langID, 
                          nsCycleCollectionLanguageRuntime *rt);
-    nsCycleCollectionLanguageRuntime * GetRuntime(PRUint32 langID);
     void ForgetRuntime(PRUint32 langID);
 
     void SelectPurple(GCGraphBuilder &builder);
     void MarkRoots(GCGraphBuilder &builder);
     void ScanRoots();
     void ScanWeakMaps();
 
     void ForgetSkippable(bool removeChildlessNodes);
@@ -2718,25 +2717,16 @@ nsCycleCollector::RegisterRuntime(PRUint
         Fault("unknown language runtime in registration");
 
     if (mRuntimes[langID])
         Fault("multiple registrations of language runtime", rt);
 
     mRuntimes[langID] = rt;
 }
 
-nsCycleCollectionLanguageRuntime *
-nsCycleCollector::GetRuntime(PRUint32 langID)
-{
-    if (langID > nsIProgrammingLanguage::MAX)
-        return nsnull;
-
-    return mRuntimes[langID];
-}
-
 void 
 nsCycleCollector::ForgetRuntime(PRUint32 langID)
 {
     if (mParams.mDoNothing)
         return;
 
     if (langID > nsIProgrammingLanguage::MAX)
         Fault("unknown language runtime in deregistration");
@@ -3801,24 +3791,16 @@ nsCycleCollector_registerRuntime(PRUint3
     if (sCollector)
         sCollector->RegisterRuntime(langID, rt);
     if (regMemReport) {
         regMemReport = false;
         NS_RegisterMemoryReporter(new NS_MEMORY_REPORTER_NAME(CycleCollector));
     }
 }
 
-nsCycleCollectionLanguageRuntime *
-nsCycleCollector_getRuntime(PRUint32 langID)
-{
-    if (sCollector)
-        sCollector->GetRuntime(langID);
-    return nsnull;
-}
-
 void 
 nsCycleCollector_forgetRuntime(PRUint32 langID)
 {
     if (sCollector)
         sCollector->ForgetRuntime(langID);
 }
 
 

--- a/xpcom/base/nsCycleCollector.h
+++ b/xpcom/base/nsCycleCollector.h
@@ -129,17 +129,16 @@ struct nsCycleCollectionJSRuntime : publ
 #ifdef DEBUG
 void nsCycleCollector_DEBUG_shouldBeFreed(nsISupports *n);
 void nsCycleCollector_DEBUG_wasFreed(nsISupports *n);
 #endif
 
 // Helpers for interacting with language-identified scripts
 
 void nsCycleCollector_registerRuntime(PRUint32 langID, nsCycleCollectionLanguageRuntime *rt);
-nsCycleCollectionLanguageRuntime * nsCycleCollector_getRuntime(PRUint32 langID);
 void nsCycleCollector_forgetRuntime(PRUint32 langID);
 
 #define NS_CYCLE_COLLECTOR_LOGGER_CID \
 { 0x58be81b4, 0x39d2, 0x437c, \
 { 0x94, 0xea, 0xae, 0xde, 0x2c, 0x62, 0x08, 0xd3 } }
 
 extern nsresult
 nsCycleCollectorLoggerConstructor(nsISupports* outer,