fix(s3): remove duplicate normalizedInfoHash declaration

Removes a redundant `const normalizedInfoHash` declaration in `s3UploadService.js` that caused a `SyntaxError` and prevented the application from loading. The variable is already declared in the outer scope of the `try` block.

js/services/s3UploadService.js

@@ -327,7 +327,7 @@ class S3UploadService {
         return false;
       }
 
-      const normalizedInfoHash = normalizeInfoHash(infoHash);
+      // normalizedInfoHash is already calculated above
       const hasValidInfoHash = isValidInfoHash(normalizedInfoHash);
       let generatedMagnet = "";
       let generatedWs = "";