Added another instance of a GDS-okay error. Also removed two that are…

… going to be fixed in Design System v3.

.hintrc

@@ -16,12 +16,11 @@
     "html-checker": ["error", {
         "ignore": [
           "Attribute “src” not allowed on element “image” at this point.",
-          "Element “image” is missing required attribute “height”.",
-          "Element “image” is missing required attribute “width”.",
           "The “banner” role is unnecessary for element “header”.",
           "The “button” role is unnecessary for element “button”.",
           "The “main” role is unnecessary for element “main”.",
-          "The “contentinfo” role is unnecessary for element “footer”."
+          "The “contentinfo” role is unnecessary for element “footer”.",
+          "Element “h1” not allowed as child of element “legend” in this context. (Suppressing further errors from this subtree.)"
         ]
     }],
     "http-cache": "error",