fix merge conflicts

Author: dnadoba

Sources/AsyncHTTPClient/ConnectionPool/State Machine/HTTPConnectionPool+StateMachine.swift

@@ -69,23 +69,6 @@ extension HTTPConnectionPool {
 
         enum HTTPVersionState {
             case http1(HTTP1StateMachine)
-            case http2(HTTP2StateMachine)
-
-            mutating func modify<ReturnValue>(
-                http1: (inout HTTP1StateMachine) -> ReturnValue,
-                http2: (inout HTTP2StateMachine) -> ReturnValue
-            ) -> ReturnValue {
-                let returnValue: ReturnValue
-                switch self {
-                case .http1(var http1State):
-                    returnValue = http1(&http1State)
-                    self = .http1(http1State)
-                case .http2(var http2State):
-                    returnValue = http2(&http2State)
-                    self = .http2(http2State)
-                }
-                return returnValue
-            }
         }
 
         var state: HTTPVersionState
@@ -239,6 +222,10 @@ extension HTTPConnectionPool.StateMachine: CustomStringConvertible {
         switch self.state {
         case .http1(let http1):
             return ".http1(\(http1))"
+        }
+    }
+}
+
 extension HTTPConnectionPool.StateMachine {
     struct ConnectionMigrationAction {
         var closeConnections: [HTTPConnectionPool.Connection]