refactor(fingerprint): simplify htmlHash computation in DqElement

computeFingerprintHash handles null input internally, so the ternary
and try/catch wrapper are unnecessary.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Abhishek Bindra

lib/core/utils/dq-element.js

@@ -343,13 +343,7 @@ const DqElement = memoize(function DqElement(elm, options, spec) {
   }
 
   // [a11y-core]: compute htmlHash before truncation
-  try {
-    this._htmlHash = this._element
-      ? computeFingerprintHash(this._element.outerHTML)
-      : computeFingerprintHash(null);
-  } catch {
-    this._htmlHash = computeFingerprintHash(null);
-  }
+  this._htmlHash = computeFingerprintHash(this._element?.outerHTML);
 
   /**
    * The generated HTML source code of the element