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/Document.ts

@@ -29,7 +29,6 @@ import {
   IsNumeric,
   IsDate,
 } from "sequelize-typescript";
-import MarkdownSerializer from "slate-md-serializer";
 import isUUID from "validator/lib/isUUID";
 import type { NavigationNode } from "@shared/types";
 import getTasks from "@shared/utils/getTasks";
@@ -50,8 +49,6 @@ import Fix from "./decorators/Fix";
 import DocumentHelper from "./helpers/DocumentHelper";
 import Length from "./validators/Length";
 
-const serializer = new MarkdownSerializer();
-
 export const DOCUMENT_VERSION = 2;
 
 @DefaultScope(() => ({
@@ -470,37 +467,6 @@ class Document extends ParanoidModel {
 
   // instance methods
 
-  migrateVersion = () => {
-    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,
-      });
-    }
-
-    return undefined;
-  };
-
   get titleWithDefault(): string {
     return this.title || "Untitled";
   }