Remove unnecessary dependencies in every CaseStudies (#1503)

* Remove unnecessary dependencies in SwiftUI-CaseStudies

* Remove unnecessary dependencies in other-CaseStudies

* Add MARK headers to every SwiftUI-CaseStudies

(cherry picked from commit 790469d1e5aaa4dd841cc017d4a1ed8a14623e99)

# Conflicts:
#	Examples/CaseStudies/SwiftUICaseStudies/00-Core.swift
#	Examples/CaseStudies/SwiftUICaseStudies/03-Navigation-Lists-LoadThenNavigate.swift
#	Examples/CaseStudies/SwiftUICaseStudies/04-HigherOrderReducers-ReusableFavoriting.swift
#	Examples/VoiceMemos/VoiceMemos/VoiceMemo.swift
#	Examples/VoiceMemos/VoiceMemos/VoiceMemos.swift
#	Examples/VoiceMemos/VoiceMemos/VoiceMemosApp.swift

Author: Jager-yoo

Examples/CaseStudies/SwiftUICaseStudies/00-Core.swift

@@ -1,6 +1,4 @@
 import ComposableArchitecture
-import ReactiveSwift
-import XCTestDynamicOverlay
 
 struct Root: ReducerProtocol {
   struct State: Equatable {

Examples/CaseStudies/SwiftUICaseStudies/00-RootView.swift

@@ -1,4 +1,3 @@
-import Combine
 import ComposableArchitecture
 import ReactiveSwift
 import SwiftUI
@@ -282,6 +281,8 @@ struct RootView: View {
   }
 }
 
+// MARK: - SwiftUI previews
+
 struct RootView_Previews: PreviewProvider {
   static var previews: some View {
     RootView(

Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-AlertsAndConfirmationDialogs.swift

@@ -19,6 +19,8 @@ private let readMe = """
   alerts and dialogs in your application
   """
 
+// MARK: - Feature domain
+
 struct AlertAndConfirmationDialog: ReducerProtocol {
   struct State: Equatable {
     var alert: AlertState<Action>?
@@ -79,6 +81,8 @@ struct AlertAndConfirmationDialog: ReducerProtocol {
   }
 }
 
+// MARK: - Feature view
+
 struct AlertAndConfirmationDialogView: View {
   let store: StoreOf<AlertAndConfirmationDialog>
 
@@ -106,6 +110,8 @@ struct AlertAndConfirmationDialogView: View {
   }
 }
 
+// MARK: - SwiftUI previews
+
 struct AlertAndConfirmationDialog_Previews: PreviewProvider {
   static var previews: some View {
     NavigationView {

Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-Animations.swift

@@ -19,6 +19,8 @@ private let readMe = """
   toggle at the bottom of the screen.
   """
 
+// MARK: - Feature domain
+
 struct Animations: ReducerProtocol {
   struct State: Equatable {
     var alert: AlertState<Action>?
@@ -86,6 +88,8 @@ struct Animations: ReducerProtocol {
   }
 }
 
+// MARK: - Feature view
+
 struct AnimationsView: View {
   let store: StoreOf<Animations>
 
@@ -137,6 +141,8 @@ struct AnimationsView: View {
   }
 }
 
+// MARK: - SwiftUI previews
+
 struct AnimationsView_Previews: PreviewProvider {
   static var previews: some View {
     Group {

Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-Bindings-Basics.swift

@@ -18,6 +18,8 @@ private let readMe = """
   component changes, which means you can keep using a unidirectional style for your feature.
   """
 
+// MARK: - Feature domain
+
 struct BindingBasics: ReducerProtocol {
   struct State: Equatable {
     var sliderValue = 5.0
@@ -55,6 +57,8 @@ struct BindingBasics: ReducerProtocol {
   }
 }
 
+// MARK: - Feature view
+
 struct BindingBasicsView: View {
   let store: StoreOf<BindingBasics>
 
@@ -119,6 +123,8 @@ private func alternate(_ string: String) -> String {
     .joined()
 }
 
+// MARK: - SwiftUI previews
+
 struct BindingBasicsView_Previews: PreviewProvider {
   static var previews: some View {
     NavigationView {

Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-Bindings-Forms.swift

@@ -13,6 +13,8 @@ private let readMe = """
   It is instructive to compare this case study to the "Binding Basics" case study.
   """
 
+// MARK: - Feature domain
+
 struct BindingForm: ReducerProtocol {
   struct State: Equatable {
     @BindableState var sliderValue = 5.0
@@ -45,6 +47,8 @@ struct BindingForm: ReducerProtocol {
   }
 }
 
+// MARK: - Feature view
+
 struct BindingFormView: View {
   let store: StoreOf<BindingForm>
 
@@ -106,6 +110,8 @@ private func alternate(_ string: String) -> String {
     .joined()
 }
 
+// MARK: - SwiftUI previews
+
 struct BindingFormView_Previews: PreviewProvider {
   static var previews: some View {
     NavigationView {

Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-Composition-TwoCounters.swift

@@ -8,6 +8,8 @@ private let readMe = """
   It reuses the the domain of the counter screen and embeds it, twice, in a larger domain.
   """
 
+// MARK: - Feature domain
+
 struct TwoCounters: ReducerProtocol {
   struct State: Equatable {
     var counter1 = Counter.State()
@@ -29,6 +31,8 @@ struct TwoCounters: ReducerProtocol {
   }
 }
 
+// MARK: - Feature view
+
 struct TwoCountersView: View {
   let store: StoreOf<TwoCounters>
 
@@ -59,6 +63,8 @@ struct TwoCountersView: View {
   }
 }
 
+// MARK: - SwiftUI previews
+
 struct TwoCountersView_Previews: PreviewProvider {
   static var previews: some View {
     NavigationView {

Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-Counter.swift

@@ -9,6 +9,8 @@ private let readMe = """
   state of the application and any actions that can affect that state or the outside world.
   """
 
+// MARK: - Feature domain
+
 struct Counter: ReducerProtocol {
   struct State: Equatable {
     var count = 0
@@ -31,6 +33,8 @@ struct Counter: ReducerProtocol {
   }
 }
 
+// MARK: - Feature view
+
 struct CounterView: View {
   let store: StoreOf<Counter>
 
@@ -75,6 +79,8 @@ struct CounterDemoView: View {
   }
 }
 
+// MARK: - SwiftUI previews
+
 struct CounterView_Previews: PreviewProvider {
   static var previews: some View {
     NavigationView {

Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-FocusState.swift

@@ -6,6 +6,8 @@ private let readMe = """
   If you tap the "Sign in" button while a field is empty, the focus will be changed to that field.
   """
 
+// MARK: - Feature domain
+
 struct FocusDemo: ReducerProtocol {
   struct State: Equatable {
     @BindableState var focusedField: Field?
@@ -41,6 +43,8 @@ struct FocusDemo: ReducerProtocol {
   }
 }
 
+// MARK: - Feature view
+
 struct FocusDemoView: View {
   let store: StoreOf<FocusDemo>
   @FocusState var focusedField: FocusDemo.State.Field?
@@ -80,6 +84,8 @@ extension View {
   }
 }
 
+// MARK: - SwiftUI previews
+
 struct FocusDemo_Previews: PreviewProvider {
   static var previews: some View {
     NavigationView {

Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-OptionalState.swift

@@ -12,6 +12,8 @@ private let readMe = """
   Tapping "Toggle counter state" will flip between the `nil` and non-`nil` counter states.
   """
 
+// MARK: - Feature domain
+
 struct OptionalBasics: ReducerProtocol {
   struct State: Equatable {
     var optionalCounter: Counter.State?
@@ -41,6 +43,8 @@ struct OptionalBasics: ReducerProtocol {
   }
 }
 
+// MARK: - Feature view
+
 struct OptionalBasicsView: View {
   let store: StoreOf<OptionalBasics>
 
@@ -76,6 +80,8 @@ struct OptionalBasicsView: View {
   }
 }
 
+// MARK: - SwiftUI previews
+
 struct OptionalBasicsView_Previews: PreviewProvider {
   static var previews: some View {
     Group {