"Remove" unused exports.

Add ESLint rule to trow an Error when linting and detecting an unused
export and update a code accordingly to that rule.

.eslintrc.json

@@ -6,7 +6,6 @@
   },
   "extends": [
     "eslint:recommended",
-    "plugin:@typescript-eslint/eslint-recommended",
     "plugin:@typescript-eslint/recommended",
     "plugin:@typescript-eslint/recommended-requiring-type-checking",
     "plugin:import/recommended",
@@ -57,6 +56,9 @@
     "no-restricted-imports": ["error", {
       "name": "electron",
       "message": "This module does not provide the information about the process type. Please use 'electron/common', 'electron/main' or 'electron/renderer' instead."
+    }],
+    "import/no-unused-modules": ["error", {
+      "unusedExports": true
     }]
   }
 }

sources/code/common/modules/package.ts

@@ -13,10 +13,10 @@ interface PersonObject {
 	url?: string;
 }
 
-export type PersonAny = string & PersonObject
-export type PersonLike = string | PersonObject
+type PersonAny = string & PersonObject
+type PersonLike = string | PersonObject
 
-export interface PackageJsonProperties {
+interface PackageJsonProperties {
 	/** Node.js-friendly application name. */
 	name: string,
     /** Node package description. */

sources/code/main/modules/config.ts

@@ -30,7 +30,7 @@ const test = {} as unknown as ConfigElement;
 if("radio" in test)
   test.radio;
 
-export interface AppConfigBase {
+interface AppConfigBase {
   settings: Record<string, Record<string, ConfigElement>>,
   update: Record<string, unknown>
 }

sources/code/main/modules/csp.ts

@@ -17,7 +17,7 @@ const cspKeysRegExp = new RegExp("(?<="+cspKeys.join("|")+")\\s+");
 
 type cspObject = Partial<Record<(typeof cspKeys)[number],string>>;
 
-export default class CSP {
+class CSP {
   private values: {
         object: cspObject,
         string: string

sources/code/renderer/modules/api.ts

@@ -1,3 +1,4 @@
+/* eslint-disable import/no-unused-modules */
 /*
  * A place to move useful WebCord's function that could be exposed to
  * third-party addons in the future as part of planned "API".