Revert "ux: Mute selected text"

I had to revert this for now because it conflicts too heavily
with the highlighter feature which we definitely want in master.

Let's rework this using Daniel's refactor

This reverts commit d663155941.

damus/Views/Muting/MutelistView.swift

@@ -15,8 +15,6 @@ struct MutelistView: View {
     @State var hashtags: [MuteItem] = []
     @State var threads: [MuteItem] = []
     @State var words: [MuteItem] = []
-    
-    @State var new_text: String = ""
 
     func RemoveAction(item: MuteItem) -> some View {
         Button {
@@ -122,9 +120,13 @@ struct MutelistView: View {
             }
         }
         .sheet(isPresented: $show_add_muteitem, onDismiss: { self.show_add_muteitem = false }) {
-            AddMuteItemView(state: damus_state, new_text: $new_text)
-                .presentationDetents([.height(300)])
-                .presentationDragIndicator(.visible)
+            if #available(iOS 16.0, *) {
+                AddMuteItemView(state: damus_state)
+                    .presentationDetents([.height(300)])
+                    .presentationDragIndicator(.visible)
+            } else {
+                AddMuteItemView(state: damus_state)
+            }
         }
     }
 }