uiautomationcore: Add UiaRemoveEvent stub.

dlls/uiautomationcore/uia_client.c

@@ -3013,3 +3013,12 @@ exit:
 
     return hr;
 }
+
+/***********************************************************************
+ *          UiaRemoveEvent (uiautomationcore.@)
+ */
+HRESULT WINAPI UiaRemoveEvent(HUIAEVENT huiaevent)
+{
+    FIXME("(%p): stub\n", huiaevent);
+    return E_NOTIMPL;
+}

dlls/uiautomationcore/uiautomationcore.spec

@@ -92,7 +92,7 @@
 @ stub UiaRaiseStructureChangedEvent
 #@ stub UiaRaiseTextEditTextChangedEvent
 @ stdcall UiaRegisterProviderCallback(ptr)
-@ stub UiaRemoveEvent
+@ stdcall UiaRemoveEvent(ptr)
 @ stdcall UiaReturnRawElementProvider(long long long ptr)
 @ stub UiaSetFocus
 @ stub UiaTextRangeRelease

include/uiautomationcoreapi.h

@@ -418,6 +418,7 @@ HRESULT WINAPI UiaNavigate(HUIANODE huianode, enum NavigateDirection dir, struct
         struct UiaCacheRequest *cache_req, SAFEARRAY **out_req, BSTR *tree_struct);
 HRESULT WINAPI UiaFind(HUIANODE huianode, struct UiaFindParams *find_params, struct UiaCacheRequest *cache_req, SAFEARRAY **out_req,
         SAFEARRAY **out_offsets, SAFEARRAY **out_tree_structs);
+HRESULT WINAPI UiaRemoveEvent(HUIAEVENT huiaevent);
 
 #ifdef __cplusplus
 }