refactor: remove unused optional-chaining plugin

[JounQin]

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[changeset-bot]

🦋 Changeset detected

Latest commit: 7f90ad4

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
babel-preset-proposal-typescript	Patch

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[codecov]

Codecov Report

Merging #118 (7f90ad4) into master (2fa901d) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #118   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           11        11           
  Lines           65        87   +22     
  Branches         4         8    +4     
=========================================
+ Hits            65        87   +22     

Impacted Files	Coverage Δ
test/function-bind.ts	100.00% <0.00%> (ø)
test/function-sent.ts	100.00% <0.00%> (ø)
test/private-methods.ts	100.00% <0.00%> (ø)
test/pipeline-operator.ts	100.00% <0.00%> (ø)
test/partial-application.ts	100.00% <0.00%> (ø)
test/private-property-in-object.ts	100.00% <0.00%> (ø)

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