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

[arshukla98]

Closes #7041

[arshukla98]

Closes: #7041

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.8%. Comparing base (fde8175) to head (42d67a2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #7086     +/-   ##
=======================================
- Coverage   75.8%   75.8%   -0.1%     
=======================================
  Files        207     207             
  Lines      19404   19402      -2     
=======================================
- Hits       14726   14723      -3     
  Misses      4245    4245             
- Partials     433     434      +1     

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

... and 1 file with indirect coverage changes

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