Remove unpaired surrogate pair regexp R2 key validation

This restriction no longer seems to apply

Author: mrbbot

packages/tre/src/plugins/r2/validator.ts

@@ -12,9 +12,6 @@ import { R2Conditional } from "./schemas";
 
 export const MAX_LIST_KEYS = 1_000;
 const MAX_KEY_SIZE = 1024;
-
-const UNPAIRED_SURROGATE_PAIR_REGEX =
-  /^(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])$/;
 const MAX_VALUE_SIZE = 5 * 1_000 * 1_000 * 1_000 - 5 * 1_000 * 1_000;
 
 function identity(ms: number) {
@@ -106,11 +103,7 @@ export class Validator {
   }
 
   key(key: string): Validator {
-    // Check key isn't too long and exists outside regex
     const keyLength = Buffer.byteLength(key);
-    if (UNPAIRED_SURROGATE_PAIR_REGEX.test(key)) {
-      throw new InvalidObjectName();
-    }
     if (keyLength >= MAX_KEY_SIZE) {
       throw new InvalidObjectName();
     }