Remove outdated Spidermon egg

[elacuesta]

It's causing an error on deployment on Python 3.12

$ shub deploy -v

...

DEPRECATION: Loading egg at /app/addons_eggs/spidermon-dash-ba46cc1-master.egg is deprecated. pip 24.3 will enforce this behaviour change. A possible replacement is to use pip for package installation. Discussion can be found at https://github.com/pypa/pip/issues/12330
WARNING: Error parsing dependencies of spidermon: Invalid version: 'dash'
WARNING: Ignoring invalid distribution -main- (/app/__main__.egg)
{"error": "requirements_error", "message": "Dependencies check exit code: 1", "details": "Pip checks failed, please fix the conflicts"}

{"status": "error", "message": "Requirements error"}
Deploy log location: /tmp/shub_deploy_phqr3y84.log
Error: Deploy failed: b'{"status": "error", "message": "Requirements error"}'