chore: Remove 16+ unused dependencies (#4910)

* chore: Remove no-longer used webpack loaders

* chore: Remove migration of markdown from Slate documents (2y old)

* chore: Remove more unused deps

* chore: Remove explicit core-js dep

* Remove more unused dependencies

* test

server/models/Revision.ts

@@ -9,7 +9,6 @@ import {
   IsNumeric,
   Length as SimpleLength,
 } from "sequelize-typescript";
-import MarkdownSerializer from "slate-md-serializer";
 import { DocumentValidation } from "@shared/validations";
 import Document from "./Document";
 import User from "./User";
@@ -17,8 +16,6 @@ import IdModel from "./base/IdModel";
 import Fix from "./decorators/Fix";
 import Length from "./validators/Length";
 
-const serializer = new MarkdownSerializer();
-
 @DefaultScope(() => ({
   include: [
     {
@@ -110,35 +107,6 @@ class Revision extends IdModel {
       order: [["createdAt", "DESC"]],
     });
   }
-
-  migrateVersion = function () {
-    let migrated = false;
-
-    // migrate from document version 0 -> 1
-    if (!this.version) {
-      // removing the title from the document text attribute
-      this.text = this.text.replace(/^#\s(.*)\n/, "");
-      this.version = 1;
-      migrated = true;
-    }
-
-    // migrate from document version 1 -> 2
-    if (this.version === 1) {
-      const nodes = serializer.deserialize(this.text);
-      this.text = serializer.serialize(nodes, {
-        version: 2,
-      });
-      this.version = 2;
-      migrated = true;
-    }
-
-    if (migrated) {
-      return this.save({
-        silent: true,
-        hooks: false,
-      });
-    }
-  };
 }
 
 export default Revision;