fix: on reset remove unnecessary fileList array (#2130)

## Description
Removed unnecessary fileList array and directly assigned an empty array
to fileObj.files.

## Motivation
Reset needs to reset all files, thus no reason to pass the file list


## Tests included
- [ ] Included for each change/fix?
- [ ] Passing? (Merge will not be approved unless this is checked) 

## Documentation
- [ ] swagger documentation updated \[required\]
- [ ] official documentation updated \[nice-to-have\]

### official documentation info
If you have updated the official documentation, please provide PR # and
URL of the pages where the updates are included

## Backend version
- [ ] Does it require a specific version of the backend
- which version of the backend is required:

## Summary by Sourcery

Bug Fixes:
- Ensure reset jobs no longer include previous datablock archive IDs by
clearing the files list during reset.

Author: nitrosx

src/app/datasets/admin-tab/admin-tab.component.ts

@@ -52,14 +52,7 @@ export class AdminTabComponent implements OnInit, OnDestroy {
               pid: "",
               files: [],
             };
-            const fileList: string[] = [];
             fileObj.pid = this.dataset["pid"];
-            if (this.dataset["datablocks"]) {
-              this.dataset["datablocks"].map((d) => {
-                fileList.push(d["archiveId"]);
-              });
-            }
-            fileObj.files = fileList;
             const job: CreateJobDtoV3 = {
               emailJobInitiator: user.email,
               type: "reset",