Remove unused content quality stubs. b=111346 r+sr=bzbarsky

content/xslt/src/xslt/txMozillaStylesheetCompiler.cpp

@@ -106,7 +106,7 @@ public:
 
     // nsIContentSink
     NS_IMETHOD WillBuildModel(void) { return NS_OK; }
-    NS_IMETHOD DidBuildModel(PRInt32 aQualityLevel);
+    NS_IMETHOD DidBuildModel();
     NS_IMETHOD WillInterrupt(void) { return NS_OK; }
     NS_IMETHOD WillResume(void) { return NS_OK; }
     NS_IMETHOD SetParser(nsIParser* aParser) { return NS_OK; }
@@ -237,7 +237,7 @@ txStylesheetSink::ReportError(const PRUnichar *aErrorText,
 }
 
 NS_IMETHODIMP 
-txStylesheetSink::DidBuildModel(PRInt32 aQualityLevel)
+txStylesheetSink::DidBuildModel()
 {  
     return mCompiler->doneLoading();
 }