[Communication][Chat] Revert reference on .cloudEnvironment to its pr…

…evious name (#1630)

* Revert .cloudEnvironment to its previous name

* Remove unused function

- parse(id:, prefix:) was previously used in getIdentifier(from:) that
  no longer exist

sdk/communication/AzureCommunicationChat/Source/NotificationUtils/IdentityUtil.swift

@@ -70,13 +70,3 @@ func isGcch(id: String) -> Bool {
     let gcchAcsUserPrefix = "gcch-acs:"
     return (id.starts(with: gcchTeamsUserPrefix) || id.starts(with: gcchAcsUserPrefix))
 }
-
-/// Parses out the id/phone number portion of a user id.
-/// - Parameters:
-///   - id: The string id.
-///   - prefix: The id prefix.
-/// - Returns: The part of the id after the prefix that corresponds to the user id or phone number of a user.
-private func parse(id: String, prefix: String) -> String {
-    let index = id.index(id.startIndex, offsetBy: prefix.count)
-    return String(id.suffix(from: index))
-}

sdk/communication/AzureCommunicationChat/Source/Serializer/IdentifierSerializer.swift

@@ -123,7 +123,7 @@ internal enum IdentifierSerializer {
                         .isAnonymous,
                     cloud: serialize(
                         cloud: teamsUser
-                            .cloudEnvironment
+                            .cloudEnviroment
                     )
                 )
             )