Revert "Make observers array Thread Safe"

This reverts commit 2d01474.

Author: kudoleh

ExampleMVVM/Presentation/Utils/Observable.swift

@@ -7,15 +7,13 @@
 
 import Foundation
 
-final public class Observable<Value> {
+public final class Observable<Value> {
 
-    private struct Observer<Value> {
+    struct Observer<Value> {
         weak var observer: AnyObject?
         let block: (Value) -> Void
     }
 
-    // To make observers array Thread Safe
-    private let queue = DispatchQueue(label: "ObservableQueue", attributes: .concurrent)
     private var observers = [Observer<Value>]()
 
     public var value: Value {
@@ -27,23 +25,17 @@ final public class Observable<Value> {
     }
 
     public func observe(on observer: AnyObject, observerBlock: @escaping (Value) -> Void) {
-        queue.async(flags: .barrier) {
-            self.observers.append(Observer(observer: observer, block: observerBlock))
-            DispatchQueue.main.async { observerBlock(self.value) }
-        }
+        observers.append(Observer(observer: observer, block: observerBlock))
+        DispatchQueue.main.async { observerBlock(self.value) }
     }
 
     public func remove(observer: AnyObject) {
-        queue.async(flags: .barrier) {
-            self.observers = self.observers.filter { $0.observer !== observer }
-        }
+        observers = observers.filter { $0.observer !== observer }
     }
 
     private func notifyObservers() {
-        queue.sync() {
-            for observer in self.observers {
-                DispatchQueue.main.async { observer.block(self.value) }
-            }
+        for observer in observers {
+            DispatchQueue.main.async { observer.block(self.value) }
         }
     }
 }