Revert "feat: Add github release update check"

[harshadixit12]

Reverts #1988

Reason: to avoid calls to github in the hot path.

To do before merging it back -

1. Reduce timeout (maybe ~500ms?)
2. Cache to avoid frequent calls

Ref https://kongstrong.slack.com/archives/C07AQH7SAF8/p1776257365864819?thread_ts=1776256700.290769&cid=C07AQH7SAF8

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 32.91%. Comparing base (6528e6e) to head (e94fe3c).

Files with missing lines	Patch %	Lines
cmd/root.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2016       +/-   ##
===========================================
- Coverage   51.12%   32.91%   -18.21%     
===========================================
  Files          78       77        -1     
  Lines        7138     7064       -74     
===========================================
- Hits         3649     2325     -1324     
- Misses       3232     4544     +1312     
+ Partials      257      195       -62     

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