Move suppression to primary locations in xplat/js

Summary:
We will soon be enforcing that flow suppressions will only apply when on an error's primary location ([post](https://fb.workplace.com/groups/179614562644215/permalink/559286354677032/)). This diff uses the codemod created in D20008770 to move all suppression comments to their primary locations in the  `xplat/js` flow root, and deletes suppression comments that are not on any primary locations.

This diff was generated with:
```
~/fbsource/fbcode/flow/packages/flow-dev-tools/bin/tool suppression-primary-locations --json-file ~/www/errors.json  ~/fbsource/xplat/js
hg st -n | xargs grep -l -P '@(partially-)?generated' | xargs hg revert
hg st -n | xargs grep -l 'format' | xargs prettier --write
```

Changelog: [Internal]

bypass-lint

Reviewed By: dsainati1

Differential Revision: D20122544

fbshipit-source-id: d94e409aadb18bb399a1ddbf9f3f2494fe4fb54c