Remove the Image tool

[ChristopherChudzicki]

Steps to Reproduce

1. Open any studio page for editing. For example, any page at https://ocw-studio-rc.odl.mit.edu/sites/wgs-s10-special-topics-in-women-gender-studies-seminar-latina-womens-voices-spring-2010/type/page/ Seems not to happen with direct links, so click on any page there.

Expected Behavior

No console errors

Actual Behavior

Console error

instrument.js:109 toolbarview-item-unavailable Objectname: "imageStyle:full"[[Prototype]]: Objectconstructor: ƒ 
ckeditor.js:5 Uncaught (in promise) TypeError: Cannot read properties of null (reading 'destroy')
    at Ot._destructor (ckeditor.js:5:20995)
    at ckeditor.js:5:22255

Sentry error: https://sentry.io/organizations/mit-office-of-digital-learning/issues/3301091136/?project=5739976

[ChristopherChudzicki]

tldr: we should either remove the image plugin all together, or at least update its config.

This error seems to be coming from our CKEditor config: This error seems to be eminating from

ocw-studio/static/js/lib/ckeditor/CKEditor.ts

Lines 112 to 114 in 0c95497

	image: {
	toolbar: ["imageStyle:full", "imageStyle:side", "|", "imageTextAlternative"]
	},

The imageStyle stuff is for CKEditor's image plugin. The image toolbar is a mini-toolbar that provides options about styling the image. But... We do not actually use that plugin. (We load it, but we do not display the main toolbar that enables it.) Maybe we used to? I'm not sure.

Additionally, we are on CKEditor 30 (iirc) and imageStyle:full was removed in 29.

Related: ckeditor/ckeditor5#11090 (comment)