revert!: remove pullTimeout subscriber option

[callmehiphop]

Relates to #468 (comment)

The PubSub team would prefer that we do not provide this option.

• Tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

[codecov]

Codecov Report

Merging #618 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #618   +/-   ##
=======================================
  Coverage   97.89%   97.89%           
=======================================
  Files          14       14           
  Lines         857      857           
  Branches      178      178           
=======================================
  Hits          839      839           
  Misses          2        2           
  Partials       16       16

Impacted Files	Coverage Δ
src/message-stream.ts	97.84% <100%> (ø)	⬆️

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[bcoe]

LGTM 👍

Do I gather that pullTimeout was added in an attempt to address a specific user's problem, and it ultimately wasn't needed?

[callmehiphop]

@bcoe yeah, that is pretty much the gist of why