Remove github signals docs folder

[silesky]

Superceded by https://github.com/segment-integrations/signals-javascript (private)

[changeset-bot]

⚠️ No Changeset found

Latest commit: 6d6944f

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[Copilot]

Pull Request Overview

This PR removes the old signals folder by deleting the README.md file containing documentation for the @segment/analytics-signals package. The deletion removes comprehensive documentation including installation instructions, usage examples, configuration options, and API references.

• Removes the entire README.md file from the signals package
• Eliminates documentation for installation, configuration, and usage patterns
• Removes examples for both snippet and npm users

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.19%. Comparing base (84cb360) to head (6d6944f).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1322   +/-   ##
=======================================
  Coverage   91.19%   91.19%           
=======================================
  Files         163      163           
  Lines        4383     4383           
  Branches     1052     1052           
=======================================
  Hits         3997     3997           
  Misses        386      386           

Flag	Coverage Δ
browser	92.21% <ø> (ø)
core	89.86% <ø> (ø)
node	87.93% <ø> (ø)

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