Fix import and avoid type defn nonsense

deno/http-codes.ts

@@ -1,4 +1,4 @@
-import { Extensible } from "./interfaces";
+import { Extensible } from "./interfaces.ts";
 
 export type HttpCode = {
     code: number;
@@ -11,8 +11,10 @@ type CodeDefinitions = {
         [K: string]: HttpCode;
     };
 };
+// FIXME: Figure out how to brand CodeDefinitions in a way that isn't
+// tedious.
 
-const httpCodes: CodeDefinitions & Extensible = {
+const httpCodes: CodeDefinitions = {
     success: {
         OK: { code: 200, name: "OK", "description": "" },
         Created: { code: 201, name: "Created" },