cleanup: Remove unused eslint-disable directives

cleanup: Remove unused eslint-disable directives

The 'camelcase' rule only applies to variables and properties,
not to function names or getter/setters.

The 'no-await-in-loop' rule only applies if there is a loop.

The 'require-atomic-updates' rule no longer applies to
properties by default.

The 'no-constant-condition' rule no longer applies to
`while(true)` by default.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3756>