Remove site-specific "hacks"

[jonathanpeppers]

There is a lot of weird checks like:

inclusive-code-reviews-browser/src/common/utils.js

Lines 754 to 786 in 41fbfbe

	function isCKEditor(t) {
	return t.classList.contains("cke_editable");
	}
	function isSlateEditor(t) {
	return t.hasAttribute("data-slate-editor");
	}
	function isWriterDuet(t) {
	return location.href.includes("writerduet.com");
	}
	function isQuillEditor(t) {
	return t.classList.contains("ql-editor");
	}
	function isOpenXchangeEditor(t) {
	return !!t.closest("[data-app-name='io.ox/office/text']");
	}
	function isProseMirror(t) {
	return t.classList.contains("ProseMirror");
	}
	function isGutenberg(t) {
	return t.classList.contains("editor-rich-text__editable") || t.classList.contains("block-editor-rich-text__editable");
	}
	function isTrixEditor(t) {
	return "trix-editor" === t.nodeName.toLowerCase();
	}
	function isGoogleDocsEditor(t) {
	return t.classList.contains("kix-page");
	}
	function isLTEditor(t) {
	return t.classList.contains("lt-textarea__textarea");
	}
	function isCodeMirror(t) {
	return t.classList.contains("CodeMirror-code");
	}

These appear to be hacks for specific websites or controls.

I removed one for "TinyMCE" in #191.

I think we could remove several more of these as long as Azure DevOps and GitHub continue to work. These seem to be a source of weird code none of us understands.