diff --git a/src/build.ts b/src/build.ts
index f22b8fe82..5b4514595 100644
--- a/src/build.ts
+++ b/src/build.ts
@@ -116,19 +116,10 @@ async function emitDom() {
     } catch {
       commentsMap = {};
     }
-    commentCleanup(commentsMap);
     const result = convert(idl, commentsMap);
     return result;
   }
 
-  function commentCleanup(commentsMap: Record<string, string>) {
-    for (const key in commentsMap) {
-      // Filters out phrases for nested comments as we retargets them:
-      // "This operation receives a dictionary, which has these members:"
-      commentsMap[key] = commentsMap[key].replace(/[,.][^,.]+:$/g, ".");
-    }
-  }
-
   function mergeApiDescriptions(
     idl: Browser.WebIdl,
     descriptions: { interfaces: { interface: Record<string, any> } },