Remove unnecessary try/catch block

packages/@uppy/aws-s3-multipart/src/MultipartUploader.js

@@ -243,27 +243,21 @@ class MultipartUploader {
 
   async #prepareUploadParts (candidates) {
     this.lockedCandidatesForBatch.push(...candidates)
-    let result
 
-    try {
-      result = await this.#retryable({
-        attempt: () => this.options.prepareUploadParts({
-          key: this.key,
-          uploadId: this.uploadId,
-          partNumbers: candidates.map((index) => index + 1),
-        }),
-      })
-    } catch (error) {
-      throw new Error(error)
-    }
-
-    const valid = typeof result?.presignedUrls === 'object'
+    const result = await this.#retryable({
+      attempt: () => this.options.prepareUploadParts({
+        key: this.key,
+        uploadId: this.uploadId,
+        partNumbers: candidates.map((index) => index + 1),
+      }),
+    })
 
-    if (!valid) {
+    if (typeof result?.presignedUrls !== 'object') {
       throw new TypeError(
         'AwsS3/Multipart: Got incorrect result from `prepareUploadParts()`, expected an object `{ presignedUrls }`.'
       )
     }
+
     return result
   }