Revert "nav: use back chevron in more places"

hitbox is annoying atm

This reverts commit ea0e28d2c5.

damus/Views/CreateAccountView.swift

@@ -101,17 +101,6 @@ struct BackNav: View {
     }
 }
 
-struct BackNavBasic: View {
-    @Environment(\.dismiss) var dismiss
-    
-    var body: some View {
-        Image(systemName: "chevron.backward")
-        .onTapGesture {
-            self.dismiss()
-        }
-    }
-}
-
 extension View {
     func placeholder<Content: View>(
         when shouldShow: Bool,

damus/Views/DMChatView.swift

@@ -119,8 +119,6 @@ struct DMChatView: View {
             }
         }
         .toolbar { Header }
-        .navigationBarBackButtonHidden(true)
-        .navigationBarItems(leading: BackNavBasic())
     }
 }
 

damus/Views/ProfileView.swift

@@ -147,8 +147,6 @@ struct ProfileView: View {
             followers.unsubscribe()
             // our profilemodel needs a bit more help
         }
-        .navigationBarBackButtonHidden(true)
-        .navigationBarItems(leading: BackNavBasic())
     }
 }
 

damus/Views/SearchView.swift

@@ -25,8 +25,6 @@ struct SearchView: View {
             .onDisappear() {
                 search.unsubscribe()
             }
-            .navigationBarBackButtonHidden(true)
-            .navigationBarItems(leading: BackNavBasic())
     }
 }