refactor: remove acorn-walk ambient type definitions

[dnalborczyk]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

Description

base is defined in acorn-walk module

[codecov]

Codecov Report

Merging #4391 (0bc3bcc) into master (efd71e9) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #4391   +/-   ##
=======================================
  Coverage   98.72%   98.72%           
=======================================
  Files         204      204           
  Lines        7320     7320           
  Branches     2080     2080           
=======================================
  Hits         7227     7227           
  Misses         34       34           
  Partials       59       59           

Impacted Files	Coverage Δ
src/utils/pureComments.ts	100.00% <100.00%> (ø)

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