Revert "fix(metal): fix simulator"

This reverts commit 27e288c.

Author: vadimvitvickiy

Sources/GPUImage/Base/MetalRenderingDevice.swift

@@ -30,15 +30,11 @@ public class MetalRenderingDevice {
                guard let queue = self.device.makeCommandQueue() else {fatalError("Could not create command queue")}
                self.commandQueue = queue
 
-              #if targetEnvironment(simulator)
-                  self.metalPerformanceShadersAreSupported = false
-              #else
-                  if #available(iOS 9, macOS 10.13, *) {
-                      self.metalPerformanceShadersAreSupported = MPSSupportsMTLDevice(device)
-                  } else {
-                    self.metalPerformanceShadersAreSupported = false
-                  }
-              #endif
+               if #available(iOS 9, macOS 10.13, *) {
+                   self.metalPerformanceShadersAreSupported = MPSSupportsMTLDevice(device)
+               } else {
+                   self.metalPerformanceShadersAreSupported = false
+               }
 
                do {
                    #if targetEnvironment(simulator)