Remove SDK docs since they are migrated to main Dapr docs

[marcduiker]

Description

Remove SDK docs since they are migrated to main Dapr docs.
This is the Docs PR that imports the JS SDK Docs: dapr/docs#4950 (the main Docs PR needs to be merged before this PR)

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

dapr/docs#4943

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (d1bf38a) to head (bec6c6c).
⚠️ Report is 34 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #726   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines            6         6           
  Branches         1         1           
=========================================
  Hits             6         6           

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