diff --git a/src/config/app.config.ts b/src/config/app.config.ts
index bfd687325..980eabfe3 100644
--- a/src/config/app.config.ts
+++ b/src/config/app.config.ts
@@ -7,46 +7,11 @@
 import { registerAs } from '@nestjs/config';
 import * as Joi from 'joi';
 import { Loglevel } from './loglevel.enum';
-import { appConfigHsts, HstsConfig, hstsSchema } from './hsts-config';
-import { appConfigCsp, CspConfig, cspSchema } from './csp-config';
-import { appConfigMedia, MediaConfig, mediaSchema } from './media-config';
-import {
-  appConfigDatabase,
-  DatabaseConfig,
-  databaseSchema,
-} from './database-config';
-import { appConfigAuth, AuthConfig, authSchema } from './auth-config';
-
-// import { LinkifyHeaderStyle } from './linkify-header-style';
 
 export interface AppConfig {
   domain: string;
   port: number;
   loglevel: Loglevel;
-  /*linkifyHeaderStyle: LinkifyHeaderStyle;
-  sourceURL: string;
-  urlPath: string;
-  host: string;
-  path: string;
-  urlAddPort: boolean;
-  cookiePolicy: string;
-  protocolUseSSL: boolean;
-  allowOrigin: string[];
-  useCDN: boolean;
-  enableAnonymous: boolean;
-  enableAnonymousEdits: boolean;
-  enableFreeURL: boolean;
-  forbiddenNoteIDs: string[];
-  defaultPermission: string;
-  sessionSecret: string;
-  sessionLife: number;
-  tooBusyLag: number;
-  enableGravatar: boolean;*/
-  hsts: HstsConfig;
-  csp: CspConfig;
-  media: MediaConfig;
-  database: DatabaseConfig;
-  auth: AuthConfig;
 }
 
 const schema = Joi.object({
@@ -56,30 +21,6 @@ const schema = Joi.object({
     .valid(...Object.values(Loglevel))
     .default(Loglevel.WARN)
     .optional(),
-  /*linkifyHeaderStyle: Joi.string().valid(...Object.values(LinkifyHeaderStyle)).default(LinkifyHeaderStyle.GFM).optional(),
-  sourceURL: Joi.string(),
-  urlPath: Joi.string(),
-  host: Joi.string().default('::').optional(),
-  path: Joi.string(),
-  urlAddPort: Joi.boolean().default(false).optional(),
-  cookiePolicy: Joi.string(),
-  protocolUseSSL: Joi.boolean().default(true).optional(),
-  allowOrigin: Joi.array().items(Joi.string()),
-  useCDN: Joi.boolean().default(false).optional(),
-  enableAnonymous: Joi.boolean().default(true).optional(),
-  enableAnonymousEdits: Joi.boolean().default(false).optional(),
-  enableFreeURL: Joi.boolean().default(false).optional(),
-  forbiddenNoteIDs: Joi.array().items(Joi.string()),
-  defaultPermission: Joi.string(),
-  sessionSecret: Joi.string(),
-  sessionLife: Joi.number().default(14 * 24 * 60 * 60 * 1000).optional(),
-  tooBusyLag: Joi.number().default(70).optional(),
-  enableGravatar: Joi.boolean().default(true).optional(),*/
-  hsts: hstsSchema,
-  csp: cspSchema,
-  media: mediaSchema,
-  database: databaseSchema,
-  auth: authSchema,
 });
 
 export default registerAs('appConfig', async () => {
@@ -87,31 +28,7 @@ export default registerAs('appConfig', async () => {
     {
       domain: process.env.HD_DOMAIN,
       port: parseInt(process.env.PORT) || undefined,
-      loglevel: process.env.HD_LOGLEVEL, //|| Loglevel.WARN,
-      /*linkifyHeaderStyle: process.env.HD_LINKIFY_HEADER_STYLE,
-      sourceURL: process.env.HD_SOURCE_URL,
-      urlPath: process.env.HD_URL_PATH,
-      host: process.env.HD_HOST || '::',
-      path: process.env.HD_PATH,
-      urlAddPort: process.env.HD_URL_ADDPORT,
-      cookiePolicy: process.env.HD_COOKIE_POLICY,
-      protocolUseSSL: process.env.HD_PROTOCOL_USESSL || true,
-      allowOrigin: toArrayConfig(process.env.HD_ALLOW_ORIGIN),
-      useCDN: process.env.HD_USECDN,
-      enableAnonymous: process.env.HD_ENABLE_ANONYMOUS || true,
-      enableAnonymousEdits: process.env.HD_ENABLE_ANONYMOUS_EDITS,
-      enableFreeURL: process.env.HD_ENABLE_FREEURL,
-      forbiddenNoteIDs: toArrayConfig(process.env.HD_FORBIDDEN_NOTE_IDS),
-      defaultPermission: process.env.HD_DEFAULT_PERMISSION,
-      sessionSecret: process.env.HD_SESSION_SECRET,
-      sessionLife: parseInt(process.env.HD_SESSION_LIFE) || 14 * 24 * 60 * 60 * 1000,
-      tooBusyLag: parseInt(process.env.HD_TOOBUSY_LAG) || 70,
-      enableGravatar: process.env.HD_ENABLE_GRAVATAR || true,*/
-      hsts: appConfigHsts,
-      csp: appConfigCsp,
-      media: appConfigMedia,
-      database: appConfigDatabase,
-      auth: appConfigAuth,
+      loglevel: process.env.HD_LOGLEVEL,
     },
     {
       abortEarly: false,
diff --git a/src/config/linkify-header-style.enum.ts b/src/config/linkify-header-style.enum.ts
deleted file mode 100644
index 7c7ab088c..000000000
--- a/src/config/linkify-header-style.enum.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
- *
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-export enum LinkifyHeaderStyle {
-  KEEP_CASE = 'keep-case',
-  LOWER_CASE = 'lower-case',
-  GFM = 'gfm',
-}