Fix: Removed the XR package from aws-amplify

[jimblanc]

Description of changes

This change removes XR from the aws-amplify umbrella package to fix an issue where multiple versions of core were being included in the project.

Issue #, if available

Description of how you validated changes

Checklist

• PR description included
• yarn test passes
• Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Merging #11055 (5c79807) into main (2f92869) will increase coverage by 0.00%.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##             main   #11055   +/-   ##
=======================================
  Coverage   82.13%   82.14%           
=======================================
  Files         193      193           
  Lines       19507    19506    -1     
  Branches     4228     4228           
=======================================
+ Hits        16023    16024    +1     
+ Misses       3196     3194    -2     
  Partials      288      288           

Impacted Files	Coverage Δ
packages/aws-amplify/src/index.ts	100.00% <ø> (ø)
...kages/amazon-cognito-identity-js/src/BigInteger.js	89.71% <0.00%> (+0.40%)	⬆️

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