feat: remove dead statsig flag (#7229)

* feat: remove dead statsig flag

* fix: e2e test

cypress/e2e/swap/settings.test.ts

-import { FeatureFlag } from '../../../src/featureFlags'
 import { getTestSelector } from '../../utils'
 
 describe('Swap settings', () => {
   it('Opens and closes the settings menu', () => {
-    cy.visit('/swap', { featureFlags: [FeatureFlag.uniswapXEnabled] })
+    cy.visit('/swap')
     cy.contains('Settings').should('not.exist')
     cy.get(getTestSelector('open-settings-dialog-button')).click()
     cy.get(getTestSelector('mobile-settings-menu')).should('not.exist')
@@ -17,7 +16,7 @@ describe('Swap settings', () => {
 
   it('should open the mobile settings menu', () => {
     cy.viewport('iphone-6')
-    cy.visit('/swap', { featureFlags: [FeatureFlag.uniswapXEnabled] })
+    cy.visit('/swap')
     cy.get(getTestSelector('open-settings-dialog-button')).click()
     cy.get(getTestSelector('mobile-settings-menu')).should('exist')
     cy.contains('Max slippage').should('exist')

src/components/FeatureFlagModal/FeatureFlagModal.tsx

@@ -8,7 +8,6 @@ import { useInfoPoolPageFlag } from 'featureFlags/flags/infoPoolPage'
 import { useInfoTDPFlag } from 'featureFlags/flags/infoTDP'
 import { useMultichainUXFlag } from 'featureFlags/flags/multichainUx'
 import { TraceJsonRpcVariant, useTraceJsonRpcFlag } from 'featureFlags/flags/traceJsonRpc'
-import { UniswapXVariant, useUniswapXFlag } from 'featureFlags/flags/uniswapx'
 import { useUniswapXEthOutputFlag } from 'featureFlags/flags/uniswapXEthOutput'
 import { useUniswapXExactOutputFlag } from 'featureFlags/flags/uniswapXExactOutput'
 import { useUniswapXSyntheticQuoteFlag } from 'featureFlags/flags/uniswapXUseSyntheticQuote'
@@ -229,12 +228,6 @@ export default function FeatureFlagModal() {
             <X size={24} />
           </CloseButton>
         </Header>
-        <FeatureFlagOption
-          variant={UniswapXVariant}
-          value={useUniswapXFlag()}
-          featureFlag={FeatureFlag.uniswapXEnabled}
-          label="Enable UniswapX on interface"
-        />
         <FeatureFlagOption
           variant={BaseVariant}
           value={useUniswapXSyntheticQuoteFlag()}

src/components/Settings/RouterPreferenceSettings/index.test.tsx

@@ -5,10 +5,6 @@ import { fireEvent, render, screen } from 'test-utils/render'
 
 import RouterPreferenceSettings from '.'
 
-jest.mock('featureFlags/flags/uniswapx', () => ({
-  useUniswapXEnabled: () => true,
-}))
-
 describe('RouterPreferenceSettings', () => {
   // Restore to default router preference before each unit test
   beforeEach(() => {

src/components/Settings/RouterPreferenceSettings/index.tsx

@@ -5,7 +5,6 @@ import UniswapXBrandMark from 'components/Logo/UniswapXBrandMark'
 import { RowBetween, RowFixed } from 'components/Row'
 import Toggle from 'components/Toggle'
 import { isUniswapXSupportedChain } from 'constants/chains'
-import { useUniswapXEnabled } from 'featureFlags/flags/uniswapx'
 import { useAppDispatch } from 'state/hooks'
 import { RouterPreference } from 'state/routing/types'
 import { useRouterPreference } from 'state/user/hooks'
@@ -25,7 +24,7 @@ const InlineLink = styled(ThemedText.BodySmall)`
 export default function RouterPreferenceSettings() {
   const { chainId } = useWeb3React()
   const [routerPreference, setRouterPreference] = useRouterPreference()
-  const uniswapXEnabled = useUniswapXEnabled() && chainId && isUniswapXSupportedChain(chainId)
+  const uniswapXEnabled = chainId && isUniswapXSupportedChain(chainId)
   const dispatch = useAppDispatch()
 
   return (

src/featureFlags/flags/uniswapx.ts

-import { BaseVariant, FeatureFlag, useBaseFlag } from '../index'
-
-export function useUniswapXFlag(): BaseVariant {
-  return useBaseFlag(FeatureFlag.uniswapXEnabled)
-}
-
-export function useUniswapXEnabled(): boolean {
-  return useUniswapXFlag() === BaseVariant.Enabled
-}
-
-export { BaseVariant as UniswapXVariant }

src/featureFlags/index.tsx

@@ -8,7 +8,6 @@ import { useGate } from 'statsig-react'
 export enum FeatureFlag {
   traceJsonRpc = 'traceJsonRpc',
   debounceSwapQuote = 'debounce_swap_quote',
-  uniswapXEnabled = 'uniswapx_enabled', // enables sending dutch_limit config to routing-api
   uniswapXSyntheticQuote = 'uniswapx_synthetic_quote',
   uniswapXEthOutputEnabled = 'uniswapx_eth_output_enabled',
   uniswapXExactOutputEnabled = 'uniswapx_exact_output_enabled',

src/lib/hooks/routing/useRoutingAPIArguments.ts

 import { SkipToken, skipToken } from '@reduxjs/toolkit/query/react'
 import { Currency, CurrencyAmount, TradeType } from '@uniswap/sdk-core'
 import { useFotAdjustmentsEnabled } from 'featureFlags/flags/fotAdjustments'
-import { useUniswapXEnabled } from 'featureFlags/flags/uniswapx'
 import { useUniswapXEthOutputEnabled } from 'featureFlags/flags/uniswapXEthOutput'
 import { useUniswapXExactOutputEnabled } from 'featureFlags/flags/uniswapXExactOutput'
 import { useUniswapXSyntheticQuoteEnabled } from 'featureFlags/flags/uniswapXUseSyntheticQuote'
@@ -30,7 +29,6 @@ export function useRoutingAPIArguments({
   tradeType: TradeType
   routerPreference: RouterPreference | typeof INTERNAL_ROUTER_PREFERENCE_PRICE
 }): GetQuoteArgs | SkipToken {
-  const uniswapXEnabled = useUniswapXEnabled()
   const uniswapXForceSyntheticQuotes = useUniswapXSyntheticQuoteEnabled()
   const userDisabledUniswapX = useUserDisabledUniswapX()
   const uniswapXEthOutputEnabled = useUniswapXEthOutputEnabled()
@@ -55,7 +53,6 @@ export function useRoutingAPIArguments({
             routerPreference,
             tradeType,
             needsWrapIfUniswapX: tokenIn.isNative,
-            uniswapXEnabled,
             uniswapXForceSyntheticQuotes,
             userDisabledUniswapX,
             uniswapXEthOutputEnabled,
@@ -69,7 +66,6 @@ export function useRoutingAPIArguments({
       tokenIn,
       tokenOut,
       tradeType,
-      uniswapXEnabled,
       uniswapXExactOutputEnabled,
       uniswapXForceSyntheticQuotes,
       userDisabledUniswapX,

src/state/routing/slice.ts

@@ -74,7 +74,6 @@ function getRoutingAPIConfig(args: GetQuoteArgs): RoutingConfig {
   // UniswapX doesn't support native out, exact-out, or non-mainnet trades (yet),
   // so even if the user has selected UniswapX as their router preference, force them to receive a Classic quote.
   if (
-    !args.uniswapXEnabled ||
     (args.userDisabledUniswapX && routerPreference !== RouterPreference.X) ||
     (tokenOutIsNative && !uniswapXEthOutputEnabled) ||
     (!uniswapXExactOutputEnabled && tradeType === TradeType.EXACT_OUTPUT) ||

src/state/routing/types.ts

@@ -42,7 +42,6 @@ export interface GetQuoteArgs {
   routerPreference: RouterPreference | typeof INTERNAL_ROUTER_PREFERENCE_PRICE
   tradeType: TradeType
   needsWrapIfUniswapX: boolean
-  uniswapXEnabled: boolean
   uniswapXForceSyntheticQuotes: boolean
   uniswapXEthOutputEnabled: boolean
   uniswapXExactOutputEnabled: boolean