removed Omit / ReturnType as those are provided by TS 3+

src/base/helpers/factory.ts

@@ -1,6 +1,5 @@
 import PropTypes from "prop-types";
 
-import { Omit, ReturnType } from "../../types";
 import { DEFAULTS, VariablesDefinitions } from "./variables";
 
 export const makePropTypesFactory: MakePropTypesFactoryFunction = makePropTypes => variables =>

src/components/dropdown/dropdown.tsx

@@ -2,7 +2,6 @@ import PropTypes from "prop-types";
 import React from "react";
 
 import { forwardRefAs } from "../../base";
-import { Omit } from "../../types";
 import {
   DropdownContainer,
   DropdownContainerProps,

src/components/modal/__docs__/simple-modal-manager.tsx

@@ -1,7 +1,6 @@
 import React from "react";
 
 import { Button } from "src/elements/button";
-import { Omit } from "src/types";
 import { Modal, ModalProps } from "../modal";
 
 interface SimpleModalManagerProps {
@@ -40,8 +39,8 @@ export class SimpleModalManager extends React.Component<
 
   private readonly close = () => {
     this.setState({ active: false });
-  }
+  };
   private readonly open = () => {
     this.setState({ active: true });
-  }
+  };
 }

src/components/modal/modal.tsx

@@ -2,7 +2,6 @@ import PropTypes from "prop-types";
 import React from "react";
 
 import { forwardRefAs } from "../../base";
-import { Omit } from "../../types";
 import { ModalBackground } from "./modal-background";
 import { ModalCard } from "./modal-card";
 import { ModalClose } from "./modal-close";

src/components/navbar/__tests__/navbar-item-container-as-dropdown.test.tsx

@@ -14,7 +14,6 @@ import {
   NavbarItemContext,
   NavbarItemContextValue,
 } from "src/components/navbar/navbar-item-context";
-import { Omit } from "src/types";
 
 import {
   testForwardRefAsExoticComponentIntegration,

src/components/navbar/navbar-item.tsx

@@ -2,7 +2,6 @@ import PropTypes from "prop-types";
 import React from "react";
 
 import { forwardRefAs } from "../../base";
-import { Omit } from "../../types";
 import {
   NavbarItemContainer,
   NavbarItemContainerProps,

src/components/navbar/navbar.tsx

@@ -2,7 +2,6 @@ import PropTypes from "prop-types";
 import React from "react";
 
 import { forwardRefAs } from "../../base";
-import { Omit } from "../../types";
 import { NavbarBrand } from "./navbar-brand";
 import { NavbarBurger } from "./navbar-burger";
 import { NavbarContainer, NavbarContainerProps } from "./navbar-container";

src/extensions/page-loader/__docs__/simple-page-loader-manager.tsx

@@ -1,7 +1,6 @@
 import React from "react";
 
 import { Button } from "src/elements/button/button";
-import { Omit } from "src/types";
 import { PageLoader, PageLoaderProps } from "../page-loader";
 
 export type SimplePageLoaderManagerProps = Omit<PageLoaderProps, "active"> & {

src/types.ts

@@ -1,5 +1,2 @@
 export type Lit = string | number | boolean | undefined | null | void | {};
-export type Omit<T, K> = Pick<T, Exclude<keyof T, K>>;
 export type Prefer<P, T> = P & Omit<T, keyof P>;
-// tslint:disable-next-line: no-any
-export type ReturnType<T> = T extends (...args: any[]) => infer R ? R : any;