internal: remove unused get_text_window

poezio/tabs/basetabs.py

@@ -390,12 +390,6 @@ class Tab:
         """
         return self.name
 
-    def get_text_window(self) -> Optional[windows.TextWin]:
-        """
-        Returns the principal TextWin window, if there's one
-        """
-        return None
-
     def on_input(self, key: str, raw: bool):
         """
         raw indicates if the key should activate the associated command or not.

poezio/tabs/conversationtab.py

@@ -439,9 +439,6 @@ class ConversationTab(OneToOneTab):
             1, self.width, self.height - 2 - self.core.information_win_size -
             Tab.tab_win_height(), 0)
 
-    def get_text_window(self):
-        return self.text_win
-
     def on_close(self):
         Tab.on_close(self)
         if config.get_by_tabname('send_chat_states', self.general_jid):

poezio/tabs/muctab.py

@@ -466,9 +466,6 @@ class MucTab(ChatTab):
         # TODO: send the disco#info identity name here, if it exists.
         return self.jid.node
 
-    def get_text_window(self) -> windows.TextWin:
-        return self.text_win
-
     def on_lose_focus(self) -> None:
         if self.joined:
             if self.input.text:

poezio/tabs/privatetab.py

@@ -361,9 +361,6 @@ class PrivateTab(OneToOneTab):
             1, self.width, self.height - 2 - self.core.information_win_size -
             Tab.tab_win_height(), 0)
 
-    def get_text_window(self):
-        return self.text_win
-
     @refresh_wrapper.conditional
     def rename_user(self, old_nick, user):
         """