Bug 1892217 - Remove Components.utils.getDOMClassInfo. r=mccr8

Differential Revision: https://phabricator.services.mozilla.com/D207855

js/xpconnect/idl/xpccomponents.idl

@@ -682,12 +682,6 @@ interface nsIXPCComponents_Utils : nsISupports
     [implicit_jscontext]
     string getClassName(in jsval aObj, in boolean aUnwrap);
 
-    /**
-     * Get a DOM classinfo for the given classname.  Only some class
-     * names are supported.
-     */
-    nsIClassInfo getDOMClassInfo(in AString aClassName);
-
     /**
      * Gets the incument global for the execution of this function. For internal
      * and testing use only.

js/xpconnect/src/XPCComponents.cpp

@@ -2181,13 +2181,6 @@ nsXPCComponents_Utils::GetClassName(HandleValue aObj, bool aUnwrap,
   return NS_OK;
 }
 
-NS_IMETHODIMP
-nsXPCComponents_Utils::GetDOMClassInfo(const nsAString& aClassName,
-                                       nsIClassInfo** aClassInfo) {
-  *aClassInfo = nullptr;
-  return NS_ERROR_NOT_AVAILABLE;
-}
-
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetIncumbentGlobal(HandleValue aCallback, JSContext* aCx,
                                           MutableHandleValue aOut) {

tools/@types/lib.gecko.xpcom.d.ts

@@ -14748,7 +14748,6 @@ interface nsIXPCComponents_Utils extends nsISupports {
   waiveXrays(aVal: any): any;
   unwaiveXrays(aVal: any): any;
   getClassName(aObj: any, aUnwrap: boolean): string;
-  getDOMClassInfo(aClassName: string): nsIClassInfo;
   getIncumbentGlobal(callback?: any): any;
   getDebugName(obj: any): string;
   getWatchdogTimestamp(aCategory: string): PRTime;