fix(L2): removes network-specific polling (#3912)

src/utils/getLibrary.ts

 import { Web3Provider } from '@ethersproject/providers'
 import ms from 'ms.macro'
 
-import { SupportedChainId } from '../constants/chains'
-
-const NETWORK_POLLING_INTERVALS: { [chainId: number]: number } = {
-  [SupportedChainId.OPTIMISM]: ms`1s`,
-  [SupportedChainId.OPTIMISTIC_KOVAN]: ms`1s`,
-}
-
 export default function getLibrary(provider: any): Web3Provider {
   const library = new Web3Provider(
     provider,
@@ -17,13 +10,6 @@ export default function getLibrary(provider: any): Web3Provider {
       ? parseInt(provider.chainId)
       : 'any'
   )
-  library.pollingInterval = 15_000
-  library.detectNetwork().then((network) => {
-    const networkPollingInterval = NETWORK_POLLING_INTERVALS[network.chainId]
-    if (networkPollingInterval) {
-      console.debug('Setting polling interval', networkPollingInterval)
-      library.pollingInterval = networkPollingInterval
-    }
-  })
+  library.pollingInterval = ms`15s`
   return library
 }