Remove JobAPI code

Remove JobAPI code because it is not used for a long time.

JobAPI uses the path /jobs/jobconfs that is not in use: https://github.com/search?q=org%3Afolio-org+jobconfs&type=Code
JobAPI uses these database tables that are not in use:

• JOB_CONF_COLLECTION: https://github.com/search?q=org%3Afolio-org+JOB_CONF_COLLECTION&type=Code
• job_confs: https://github.com/search?q=org%3Afolio-org+job_confs&type=Code
• JOBS_COLLECTION: https://github.com/search?q=org%3Afolio-org+JOBS_COLLECTION&type=Code
• BULKS_COLLECTION: https://github.com/search?q=org%3Afolio-org+BULKS_COLLECTION&type=Code
• bulks: https://github.com/search?q=org%3Afolio-org+bulks&type=Code

I've also checked that a tenant at a folio-complete installation does not have the tables:

folio=# \d *.job_confs
Did not find any relation named "*.job_confs".
folio=# \d *.jobs
Did not find any relation named "*.jobs".
folio=# \d *.bulks
Did not find any relation named "*.bulks".

And the classes to be removed are also not used:

• FileDataHandler: https://github.com/search?q=org%3Afolio-org+FileDataHandler&type=Code
• ImportJobRunnerDemo: https://github.com/search?q=org%3Afolio-org+ImportJobRunnerDemo&type=Code
• JobAPI: https://github.com/search?q=org%3Afolio-org++JobAPI&type=Code
• JobsRunner: https://github.com/search?q=org%3Afolio-org+JobsRunner&type=Code
• ProcessUploads: https://github.com/search?q=org%3Afolio-org+ProcessUploads&type=Code