remove zstandard to address nvbug 5149698

[pstjohn]

Removes zstandard after installing NeMo to avoid issues like the following downloading large binary files with ngcsdk.

https://nvbugspro.nvidia.com/bug/5149698

    raise DecodeError(
urllib3.exceptions.DecodeError: ('Received response with content-encoding: zstd, but failed to decode it.', ZstdError('cannot use a decompressobj multiple times'))
...
requests.exceptions.ContentDecodingError: ('Received response with content-encoding: zstd, but failed to decode it.', ZstdError('cannot use a decompressobj multiple times'))

[trvachov]

LGTM

Do you plan on attempting to remove lm-eval?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.20%. Comparing base (588fb75) to head (04c33da).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #726      +/-   ##
==========================================
- Coverage   85.93%   84.20%   -1.74%     
==========================================
  Files         120      128       +8     
  Lines        7310     8020     +710     
==========================================
+ Hits         6282     6753     +471     
- Misses       1028     1267     +239     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.