Remove all @available(iOS 14... annotations

RiotSwiftUI/Modules/Common/Bridging/VectorContentView.swift

@@ -19,7 +19,6 @@ import SwiftUI
 /// A Modifier to be called from the top-most SwiftUI view before being added to a HostViewController.
 ///
 /// Provides any app level configuration the SwiftUI hierarchy might need (E.g. to monitor theme changes).
-@available(iOS 14.0, *)
 struct VectorContentModifier: ViewModifier {
     
     @ObservedObject private var themePublisher = ThemePublisher.shared
@@ -38,7 +37,6 @@ struct VectorContentModifier: ViewModifier {
     }
 }
 
-@available(iOS 14.0, *)
 extension View {
     func vectorContent() -> some View {
         self.modifier(VectorContentModifier())