docs: remove unused static files

[booc0mtaco]

• remove leftovers from static theme examples

Test Plan:

• n/a (documentation-only change)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.06%. Comparing base (2a2e925) to head (fc327bb).

Additional details and impacted files

@@           Coverage Diff           @@
##             next    #2065   +/-   ##
=======================================
  Coverage   97.06%   97.06%           
=======================================
  Files         111      111           
  Lines        2756     2756           
  Branches      732      732           
=======================================
  Hits         2675     2675           
  Misses         78       78           
  Partials        3        3           

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[github-actions]

size-limit report 📦

Path	Size
components	92.46 KB (0%)
styles	28.73 KB (0%)

[booc0mtaco]

@timzchang thanks !