remove unused phase0/altair-specific REST deserialization (#4605)

beacon_chain/consensus_object_pools/block_quarantine.nim

@@ -88,7 +88,7 @@ func checkMissing*(quarantine: var Quarantine): seq[FetchRecord] =
 
 # TODO stew/sequtils2
 template anyIt(s, pred: untyped): bool =
-  # https://github.com/nim-lang/Nim/blob/version-1-2/lib/pure/collections/sequtils.nim#L682-L704
+  # https://github.com/nim-lang/Nim/blob/v1.6.10/lib/pure/collections/sequtils.nim#L753-L775
   # without the items(...)
   var result = false
   for it {.inject.} in s:

beacon_chain/spec/eth2_apis/eth2_rest_serialization.nim

@@ -134,10 +134,6 @@ type
     Web3SignerSignatureResponse |
     Web3SignerStatusResponse
 
-  SszDecodeTypes* =
-    GetPhase0StateSszResponse |
-    GetPhase0BlockSszResponse
-
   RestVersioned*[T] = object
     data*: T
     jsonVersion*: ConsensusFork
@@ -2864,29 +2860,6 @@ proc decodeBytes*[T: DecodeTypes](
   else:
     err("Content-Type not supported")
 
-proc decodeBytes*[T: SszDecodeTypes](
-       t: typedesc[T],
-       value: openArray[byte],
-       contentType: Opt[ContentTypeData],
-       updateRoot = true
-     ): RestResult[T] =
-
-  if contentType.isNone() or
-     isWildCard(contentType.get().mediaType):
-    return err("Missing or incorrect Content-Type")
-
-  let mediaType = contentType.get().mediaType
-  if mediaType == OctetStreamMediaType:
-    try:
-      var v: RestResult[T]
-      v.ok(T()) # This optimistically avoids an expensive genericAssign
-      readSszBytes(value, v.get(), updateRoot)
-      v
-    except SerializationError as exc:
-      err("Serialization error")
-  else:
-    err("Content-Type not supported")
-
 proc encodeString*(value: string): RestResult[string] =
   ok(value)
 

beacon_chain/spec/eth2_apis/rest_types.nim

@@ -607,14 +607,8 @@ type
         serializedFieldName: "validator_registration".}:
           Web3SignerValidatorRegistration
 
-  GetBlockResponse* = DataEnclosedObject[phase0.SignedBeaconBlock]
-  GetStateResponse* = DataEnclosedObject[phase0.BeaconState]
   GetBlockV2Response* = ForkedSignedBeaconBlock
   GetStateV2Response* = ref ForkedHashedBeaconState
-  GetPhase0StateSszResponse* = phase0.BeaconState
-  GetAltairStateSszResponse* = altair.BeaconState
-  GetPhase0BlockSszResponse* = phase0.SignedBeaconBlock
-  GetAltairBlockSszResponse* = altair.SignedBeaconBlock
 
   RestRoot* = object
     root*: Eth2Digest