Remove SemVersion from instrumentation/github.com/gorilla/mux/otelmux

[arshukla98]

Closes #7040

[arshukla98]

Closes: #7040

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.8%. Comparing base (3f436b2) to head (0a90832).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #7084     +/-   ##
=======================================
- Coverage   75.8%   75.8%   -0.1%     
=======================================
  Files        207     207             
  Lines      19488   19486      -2     
=======================================
- Hits       14789   14786      -3     
  Misses      4265    4265             
- Partials     434     435      +1     

Files with missing lines	Coverage Δ
...entation/github.com/gorilla/mux/otelmux/version.go	100.0% <ø> (+40.0%)	⬆️

... and 1 file with indirect coverage changes

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