Audit unused fxa-admin-server packages

[data-sync-user]

fxa/packages/fxa-admin-server% npx depcheck
Unused dependencies
* @nestjs/mapped-types
* @sentry/integrations
* @sentry/node
* apollo-server
* apollo-server-express
* graphql-tools
* mozlog
* mysql
Unused devDependencies
* @types/graphql
* @types/rimraf
* chai
* esbuild
* esbuild-register
* prettier
* proxyquire
* tsconfig-paths
Missing dependencies
* @nestjs/testing: ./test/app.e2e-spec.ts
* fxa-admin-server: ./src/gql/email-bounce/email-bounce.resolver.spec.ts
* objection: ./scripts/email-bounce.ts

┆Issue is synchronized with this Jira Task

[data-sync-user]

➤ Wil Clouser commented:

This will be covered in other issues.