Remove unnecessary error check

ethers/testing.nim

@@ -1,9 +1,7 @@
 import std/strutils
-import std/json
 import ./provider
 
 proc revertReason*(e: ref ProviderError): string =
-  try:
   var msg = e.msg
   const revertPrefixes = @[
     # hardhat
@@ -16,8 +14,6 @@ proc revertReason*(e: ref ProviderError): string =
     msg = msg.replace(prefix)
   msg = msg.replace("\'")
   return msg
-  except JsonParsingError:
-    return ""
 
 proc reverts*[T](call: Future[T]): Future[bool] {.async.} =
   try: