This commit makes a few minor changes to enable syncing the CLI repository
into google3.
1. mark pkg_tar and pkg_npm as external
2. remove dependencies (marked as comment) which are stale in google3
3. remove TS files generated from JSON schema in BUILD files since these
files are compiled and added to the g3 codebase at sync time
4. Some minor typing changes
5. Remove duplicate licenses
6. mark dependencies which are not available in g3 as external
7. Immediately type the result of JSON.parse() as required by g3 linter.
Otherwise, the type defaults to `any`.
