revert: quoting of resource_link_id to align with LTI spec

[navinkarkera]

Description:

This reverts commit 2b5fc5c and parts of f78cce7.

More information can be found in #621

Related issue: #621

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.59%. Comparing base (c3f5a6e) to head (0ef474f).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #623      +/-   ##
==========================================
- Coverage   97.60%   97.59%   -0.01%     
==========================================
  Files          79       79              
  Lines        6876     6871       -5     
==========================================
- Hits         6711     6706       -5     
  Misses        165      165              

Flag	Coverage Δ
unittests	97.59% <100.00%> (-0.01%)	⬇️

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[rpenido]

LGTM 👍
Thank you for your work, @navinkarkera!

• I tested this using the instructions from the PR
• I read through the code
• I checked for accessibility issues
• Includes documentation

[Faraz32123]

Do we still need this validation, as we are reverting both PRs?

[navinkarkera]

@Faraz32123 No, we are just removing quoting of location/usage_keys.