remove unused function countFiles

ImageViewer/ViewController.swift

@@ -721,36 +721,6 @@ class ViewController: UIViewController, UIGestureRecognizerDelegate {
         }
     }
 
-    func countFiles() -> Int {
-        var count = 0
-        if let enumerator = fileManager.enumerator(
-            at: currentPath, includingPropertiesForKeys: [.isDirectoryKey],
-            options: [.skipsHiddenFiles]
-        ) {
-            for case let dir as URL in enumerator {
-                do {
-                    if let enumerator = fileManager.enumerator(
-                        at: dir, includingPropertiesForKeys: [.isRegularFileKey],
-                        options: [.skipsHiddenFiles]
-                    ) {
-                        for case let file as URL in enumerator {
-                            let resourceValues = try file.resourceValues(forKeys: [
-                                .isRegularFileKey,
-                            ])
-                            if resourceValues.isRegularFile == true {
-                                count += 1
-                            }
-                        }
-                    }
-
-                } catch {
-                    print("Error reading file attributes for \(dir):", error)
-                }
-            }
-        }
-        return count
-    }
-
     func setupScrollingCollectionView() {
         let layout = UICollectionViewFlowLayout()
         layout.minimumInteritemSpacing = 0