tmp remove DeckAuthor columns

we don't yet have logic for handling switching 'deck authors' and this
is causing two problems:
1. the column title isn't renamed when the selected account is changed
2. when saving a deck author column to disk and the account is switched
   beforehand, it switches to the current deck author's column

Signed-off-by: kernelkind <kernelkind@gmail.com>

src/ui/add_column.rs

@@ -178,11 +178,7 @@ impl<'a> AddColumnView<'a> {
         });
 
         if let Some(acc) = self.cur_account {
-            let source = if acc.secret_key.is_some() {
+            let source = PubkeySource::Explicit(acc.pubkey);
-                PubkeySource::DeckAuthor
-            } else {
-                PubkeySource::Explicit(acc.pubkey)
-            };
 
             vec.push(ColumnOptionData {
                 title: "Home timeline",