refactor(Examples): remove unused imported binding

[Muh9049]

Please describe the changes this PR makes and why it should be merged:

The imported binding WebSocketShard is actually never used throughout the code in the examples/basic/adapter.ts file, so there's no point in it being there.

Status and versioning classification:

• [x] Code changes have been tested against the Discord API, or there are no code changes

[codecov[bot]]

Codecov Report

Merging #172 (e3380e5) into main (636f54f) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #172   +/-   ##
=======================================
  Coverage   72.75%   72.75%           
=======================================
  Files          20       20           
  Lines         903      903           
  Branches      216      216           
=======================================
  Hits          657      657           
  Misses        244      244           
  Partials        2        2           

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