fix: downloading gifs will often return undefined

[pedrokohler]

PR Details

Bug fix.

Description

Just removed a check for 'FETCHING'.

Related Issue

closes #2029

Motivation and Context

When you try to download gifs it will often return 'undefined'.

How Has This Been Tested

Manually

Types of changes

• [ ] Dependency change
• [X] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [X] My code follows the code style of this project.
• [ ] I have updated the documentation accordingly (index.d.ts).

[alechkos]

@pedrokohler Did you tested on Chrome either and on other media types like images/videos/etc?