[SC-1287] Remove deprecated script for docgen

[zZoMROT]

Static Code Analysis (readability, compactness):

The utility is deprecated and no longer necessary. It's possible to replace it with a custom template for docgen.

Dynamic Code Analysis (external APIs, interaction flows):

• The utility has been compromised by malicious actors who created a harmful npm package with the same name. This malicious package installs when the command is run without prior dependency installation, and, after installed, opens a shell to the host machine.
• This PR removes the potential risk for developers to unintentionally compromise their own systems.

Efficiency (gas costs, computational complexity, memory requirements):

No changes affecting gas or resource efficiency.

Opinion, trade-offs and other thoughts (optional):

Looks like should be updated asap.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.33%. Comparing base (7dab142) to head (e8db2eb).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #157   +/-   ##
=======================================
  Coverage   93.33%   93.33%           
=======================================
  Files          17       17           
  Lines         345      345           
  Branches       67       67           
=======================================
  Hits          322      322           
  Misses         23       23           

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