Remove public construct check for configurable variables in API doc generation

[NipunaMadhushan]

Purpose

$subject

Fixes ballerina-platform/ballerina-dev-tools#359

Approach

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Samples

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Remarks

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Check List

• Read the Contributing Guide
• Updated Change Log
• Checked Tooling Support (#)
• Added necessary tests
  • Unit Tests
  • Spec Conformance Tests
  • Integration Tests
  • Ballerina By Example Tests
• Increased Test Coverage
• Added necessary documentation
  • API documentation
  • Module documentation in Module.md files
  • Ballerina By Examples

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.39%. Comparing base (e6b095b) to head (56ca67d).
Report is 523 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #43044      +/-   ##
============================================
+ Coverage     77.20%   77.39%   +0.18%     
- Complexity    51293    58335    +7042     
============================================
  Files          2929     3453     +524     
  Lines        204407   219064   +14657     
  Branches      26664    28766    +2102     
============================================
+ Hits         157817   169543   +11726     
- Misses        38027    40182    +2155     
- Partials       8563     9339     +776     

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[github-actions]

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