Remove upgrade and upgrade check

[NitinAgg]

Description

Safety checklist

• This change is backwards compatible and safe to apply by existing users
• This change will NOT lead to data loss
• This change will NOT lead to downtime who already has an env/service setup

How has this change been tested, beside unit tests?

YOUR_ANSWER

[codecov]

Codecov Report

Merging #933 (42106ea) into main (e0b7ed2) will decrease coverage by 0.15%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #933      +/-   ##
==========================================
- Coverage   71.67%   71.51%   -0.16%     
==========================================
  Files         118      116       -2     
  Lines        7994     7907      -87     
==========================================
- Hits         5730     5655      -75     
+ Misses       2264     2252      -12     

Flag	Coverage Δ
unittests	71.51% <0.00%> (-0.16%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
opta/cli.py	73.84% <ø> (-0.07%)	⬇️
opta/commands/apply.py	78.72% <0.00%> (-0.66%)	⬇️
opta/commands/output.py	92.30% <ø> (-0.38%)	⬇️
opta/utils/globals.py	0.00% <0.00%> (-75.00%)	⬇️

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