chore: use native flatMap (#2231)

package.json

@@ -80,7 +80,6 @@
     "graphql-request": "^3.4.0",
     "inter-ui": "^3.13.1",
     "jest-styled-components": "^7.0.5",
-    "lodash.flatmap": "^4.5.0",
     "luxon": "^1.25.0",
     "ms.macro": "^2.0.0",
     "multicodec": "^3.0.1",

src/hooks/useAllCurrencyCombinations.ts

 import { Currency, Token } from '@uniswap/sdk-core'
-import flatMap from 'lodash.flatmap'
 import { useMemo } from 'react'
 import { ADDITIONAL_BASES, BASES_TO_CHECK_TRADES_AGAINST, CUSTOM_BASES } from '../constants/routing'
 import { useActiveWeb3React } from './web3'
@@ -20,7 +19,7 @@ export function useAllCurrencyCombinations(currencyA?: Currency, currencyB?: Cur
   }, [chainId, tokenA, tokenB])
 
   const basePairs: [Token, Token][] = useMemo(
-    () => flatMap(bases, (base): [Token, Token][] => bases.map((otherBase) => [base, otherBase])),
+    () => bases.flatMap((base): [Token, Token][] => bases.map((otherBase) => [base, otherBase])),
     [bases]
   )
 

src/state/user/hooks.tsx

@@ -4,7 +4,6 @@ import { L2_CHAIN_IDS } from 'constants/chains'
 import { SupportedLocale } from 'constants/locales'
 import { L2_DEADLINE_FROM_NOW } from 'constants/misc'
 import JSBI from 'jsbi'
-import flatMap from 'lodash.flatmap'
 import { useCallback, useMemo } from 'react'
 import { shallowEqual } from 'react-redux'
 import { useAppDispatch, useAppSelector } from 'state/hooks'
@@ -285,7 +284,7 @@ export function useTrackedTokenPairs(): [Token, Token][] {
   const generatedPairs: [Token, Token][] = useMemo(
     () =>
       chainId
-        ? flatMap(Object.keys(tokens), (tokenAddress) => {
+        ? Object.keys(tokens).flatMap((tokenAddress) => {
             const token = tokens[tokenAddress]
             // for each token on the current chain,
             return (

yarn.lock

@@ -13176,11 +13176,6 @@ lodash.debounce@^4.0.8:
   resolved "https://registry.yarnpkg.com/lodash.debounce/-/lodash.debounce-4.0.8.tgz#82d79bff30a67c4005ffd5e2515300ad9ca4d7af"
   integrity sha1-gteb/zCmfEAF/9XiUVMArZyk168=
 
-lodash.flatmap@^4.5.0:
-  version "4.5.0"
-  resolved "https://registry.npmjs.org/lodash.flatmap/-/lodash.flatmap-4.5.0.tgz"
-  integrity sha1-74y/QI9uSCaGYzRTBcaswLd4cC4=
-
 lodash.get@^4, lodash.get@^4.4.2:
   version "4.4.2"
   resolved "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz"