Revert "Add new classes to wikitext created emphasised elements to make them easily stylable (#8163)"

This reverts commit 44cf2e3c70.

core/modules/parsers/wikiparser/rules/codeinline.js

@@ -48,9 +48,6 @@ exports.parse = function() {
 		tag: "code",
 		children: [{
 			type: "text",
-			attributes: {
-				class: {type: "string", value: "tc-emphasis tc-code"}
-			},
 			text: text,
 			start: start,
 			end: this.parser.pos