🔥 Remove unused utils and constants

- `getDisplayName`,
- `mapProps`
- `defaultProps`
- `withProps`
- `useIsMounted`
- `COLUMNS_PROP`

Author: exah

src/flex-grid/constants.js

@@ -1,2 +1 @@
 export const DEFAULT_GRID = 12
-export const COLUMNS_PROP = 'columns'

src/index.js

@@ -58,8 +58,5 @@ export {
 } from './match-media'
 
 export {
-  createBase,
-  mapProps,
-  defaultProps,
-  withProps
+  createBase
 } from './utils'

src/utils.js

@@ -1,42 +1,11 @@
-import React, { useEffect, useState, useContext } from 'react'
-import { isFn, isStr } from '@exah/utils'
-import isPropValid from '@emotion/is-prop-valid'
+import { useContext } from 'react'
 import { ThemeContext } from '@emotion/core'
+import isPropValid from '@emotion/is-prop-valid'
 import { createBaseFactory } from 'react-styled-base'
 
 export const createBase = createBaseFactory({ filter: isPropValid })
 export const blacklistOf = (styles) => Object.keys(Object(styles.propTypes))
 
-export const getDisplayName = (comp, fallback = 'Component') =>
-  (isStr(comp) ? comp : (comp.displayName || comp.name || fallback))
-
-export const mapProps = (fn) => (Comp) => {
-  const HOC = (props) => (
-    <Comp {...fn(props)} />
-  )
-
-  HOC.displayName = `mapProps(${getDisplayName(Comp)})`
-  return HOC
-}
-
-export const defaultProps = (data) => mapProps((props) => ({
-  ...isFn(data) ? data(props) : data,
-  ...props
-}))
-
-export const withProps = (data) => mapProps((props) => ({
-  ...props,
-  ...isFn(data) ? data(props) : data
-}))
-
-export function useIsMounted () {
-  const [ isMounted, setIsMounted ] = useState(false)
-
-  useEffect(() => setIsMounted(true), [])
-
-  return isMounted
-}
-
 export function useTheme () {
   return useContext(ThemeContext)
 }