Dropping unused swift class

launchers/macosx/I2PLauncher/routermgmt/I2PSubprocess.swift

-//
-//  I2PSubprocess.swift
-//  I2PLauncher
-//
-//  Created by Mikal Villa on 18/09/2018.
-//  Copyright © 2018 The I2P Project. All rights reserved.
-//
-
-import Foundation
-
-protocol I2PSubprocess {
-  var subprocessPath: String? { get set }
-  var arguments: String? { get set }
-  var timeWhenStarted: Date? { get set }
-  
-  func findJava();
-  
-}
-
-extension I2PSubprocess {
-  func toString() -> String {
-    let jp = self.subprocessPath!
-    let args = self.arguments!
-    
-    var presentation:String = "I2PSubprocess[ cmd="
-    presentation += jp
-    presentation += " , args="
-    presentation += args
-    presentation += "]"
-    return presentation
-  }
-}