remove unnecessary toLocalBufferType calls

Author: PavelSafronov

src/utils.ts

@@ -876,7 +876,7 @@ export class BufferPool {
       }
     }
 
-    return ByteUtils.toLocalBufferType(result);
+    return result;
   }
 }
 
@@ -1339,7 +1339,7 @@ export function decorateDecryptionResult(
   if (isTopLevelDecorateCall) {
     // The original value could have been either a JS object or a BSON buffer
     if (BSONByteUtils.isUint8Array(original)) {
-      original = deserialize(ByteUtils.toLocalBufferType(original));
+      original = deserialize(original);
     }
     if (BSONByteUtils.isUint8Array(decrypted)) {
       throw new MongoRuntimeError('Expected result of decryption to be deserialized BSON object');