Removed unneeded chaining

Author: wibosco

CoreDataMigration-Example/CoreData/Migration/CoreDataMigrator.swift

@@ -92,11 +92,15 @@ class CoreDataMigrator {
             return
         }
 
-        let model = currentCoreDataStoreMigrationVersionModel.managedObjectModel()
-        let persistentStoreCoordinator = NSPersistentStoreCoordinator(managedObjectModel: model)
-        
-        let options = [NSSQLitePragmasOption: ["journal_mode": "DELETE"]]
-        persistentStoreCoordinator.addPersistentStore(at: storeURL, options: options)
-        persistentStoreCoordinator.removeStore(at: storeURL)
+        do {
+            let model = currentCoreDataStoreMigrationVersionModel.managedObjectModel()
+            let persistentStoreCoordinator = NSPersistentStoreCoordinator(managedObjectModel: model)
+            
+            let options = [NSSQLitePragmasOption: ["journal_mode": "DELETE"]]
+            let store = persistentStoreCoordinator.addPersistentStore(at: storeURL, options: options)
+            try persistentStoreCoordinator.remove(store)
+        } catch let error {
+            fatalError("failed to force WAL checkpointing, error: \(error)")
+        }
     }
 }

CoreDataMigration-Example/Extensions/NSPersistentStoreCoordinator/NSPersistentStoreCoordinator+SQLite.swift

@@ -21,20 +21,6 @@ extension NSPersistentStoreCoordinator {
         }
     }
 
-    // MARK: - Remove
-    
-    func removeStore(at storeURL: URL) {
-        guard let persistentStore = persistentStore(for: storeURL) else {
-            return
-        }
-        
-        do {
-            try remove(persistentStore)
-        } catch let error {
-            fatalError("failed to remove persistent store at \(storeURL), error: \(error)")
-        }
-    }
-    
     // MARK: - Replace
 
     static func replaceStore(at targetURL: URL, withStoreAt sourceURL: URL) {