fix: undo polygon auto-slippage changes (#4379)

src/hooks/useAutoSlippageTolerance.ts

@@ -3,7 +3,7 @@ import { Currency, CurrencyAmount, Percent, TradeType } from '@uniswap/sdk-core'
 import { Pair } from '@uniswap/v2-sdk'
 import { Pool } from '@uniswap/v3-sdk'
 import { useWeb3React } from '@web3-react/core'
-import { SUPPORTED_GAS_ESTIMATE_CHAIN_IDS, SupportedChainId } from 'constants/chains'
+import { SUPPORTED_GAS_ESTIMATE_CHAIN_IDS } from 'constants/chains'
 import { L2_CHAIN_IDS } from 'constants/chains'
 import JSBI from 'jsbi'
 import useNativeCurrency from 'lib/hooks/useNativeCurrency'
@@ -68,7 +68,6 @@ function guesstimateGas(trade: Trade<Currency, Currency, TradeType> | undefined)
 }
 
 const MIN_AUTO_SLIPPAGE_TOLERANCE = new Percent(5, 1000) // 0.5%
-const POLYGON_MIN_AUTO_SLIPPAGE_TOLERANCE = new Percent(1, 100) // 1%
 const MAX_AUTO_SLIPPAGE_TOLERANCE = new Percent(25, 100) // 25%
 
 /**
@@ -115,13 +114,8 @@ export default function useAutoSlippageTolerance(
         return MAX_AUTO_SLIPPAGE_TOLERANCE
       }
 
-      // TODO(vm): Added because ~30% of Polygon swaps were failing due to exceeding slippage.
-      // The root cause is likely elsewhere, but added for now to reduce failure rate on production.
-      const isPolygon = chainId && [SupportedChainId.POLYGON, SupportedChainId.POLYGON_MUMBAI].includes(chainId)
-      const minAutoSlippageTolerance = isPolygon ? POLYGON_MIN_AUTO_SLIPPAGE_TOLERANCE : MIN_AUTO_SLIPPAGE_TOLERANCE
-
-      if (result.lessThan(minAutoSlippageTolerance)) {
-        return minAutoSlippageTolerance
+      if (result.lessThan(MIN_AUTO_SLIPPAGE_TOLERANCE)) {
+        return MIN_AUTO_SLIPPAGE_TOLERANCE
       }
 
       return result