Revert "feat: allow to import TS files with js extension (#3536)"

[chenjiahan]

This reverts commit 880d337.

Summary

The feature is been reverted because it cannot handle some edge cases. We should enable it after fixing these issues.

Related Links

• [Bug]: Compilation errors occur when using extensionAlias with package names ending in *.js #3557
• feat: allow to import TS files with js extension #3536

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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