msxml3/tests: remove unneeded assignment (LLVM/Clang)

[Austin English]

-- 
-Austin
-------------- next part --------------
diff --git a/dlls/msxml3/tests/domdoc.c b/dlls/msxml3/tests/domdoc.c
index 527b46d..34cc322 100644
--- a/dlls/msxml3/tests/domdoc.c
+++ b/dlls/msxml3/tests/domdoc.c
@@ -883,7 +883,7 @@ static void test_domdoc( void )
 if (0)
 {
     /* crashes on native */
-    r = IXMLDOMDocument_loadXML( doc, (BSTR)0x1, NULL );
+    IXMLDOMDocument_loadXML( doc, (BSTR)0x1, NULL );
 }
 
     /* try some stupid things */