diff --git a/src/browserlib/extract-dfns.mjs b/src/browserlib/extract-dfns.mjs
index 8818bdbe..b59322e7 100644
--- a/src/browserlib/extract-dfns.mjs
+++ b/src/browserlib/extract-dfns.mjs
@@ -355,12 +355,6 @@ function preProcessHTML() {
   [...document.querySelectorAll("dfn[id]:not([data-dfn-type]):not([data-skip])")]
     .forEach(el => {
       // Hard coded rules for special ids
-      // hyphen in attribute name throws off other match rules
-      if (el.id === "attr-form-accept-charset") {
-        el.dataset.dfnType = 'element-attr';
-        el.dataset.dfnFor = "form";
-        return;
-      }
       // dom-style is defined elsewhere
       if (el.id === "dom-style") {
         el.dataset.dfnType = 'attribute';
@@ -392,32 +386,6 @@ function preProcessHTML() {
           return;
         }
       }
-      if ((m = el.id.match(/^attr-([^-]+)-([^-]+)$/))) {
-        // e.g. attr-ul-type
-        el.dataset.dfnType = 'element-attr';
-        let _for = fromIdToElement(m[1]);
-        // special casing usemap attribute
-        if (m[1] === "hyperlink" && m[2] === "usemap") {
-          _for = "img,object";
-          return;
-        }
-        if (m[1] === "aria") {
-          // reference to external defined elements, noexport
-          el.dataset.noexport = true;
-          return;
-        }
-        // "loading", "crossorigin", "autocapitalize" are used in middle position
-        // when describing possible keywords
-        if (["loading", "crossorigin", "autocapitalize"].includes(m[1])) {
-          el.dataset.dfnType = 'dfn';
-          // Not sure how to indicate this is for an attribute value
-          // _for = m[1];
-        }
-        if (_for && !el.dataset.dfnFor) {
-          el.dataset.dfnFor = _for;
-        }
-        return;
-      }
       if ((m = el.id.match(/^attr-([^-]+)$/))) {
         el.dataset.dfnType = 'element-attr';
         // not sure how to encode "every html element"?