Remove br encoding

[dogancanbakir]

Proposed changes

Closes #519.

This PR removes br encoding from the request as the issue is not always reproducible.

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[Mzack9999]

While this might be a viable solution, I think the proper one should be decoding the body it if the header is present, or even better detect br encoding via the initial magic bytes (even though this doesn't seem like the case for brotli). What do you think? <= implemented at projectdiscovery/utils#371

[Mzack9999]

lgtm - not sure it's anymore necessary with projectdiscovery/utils#371

[dogancanbakir]

Thanks for the review. Unfortunately, even with projectdiscovery/utils#371, the behavior was non-deterministic. So, that's why I raised this PR /shrug.

[tarunKoyalwar]

how about using https://pkg.go.dev/net/http#DetectContentType to detect content type manually by magic bytes. If i am not wrong net/http already does this for every request or response

[tarunKoyalwar]

lgtm !