Remove legacy import option (#3536)

* Remove legacy import option

* Always return False in legacy_import_export()

qt/aqt/forms/preferences.ui

@@ -611,28 +611,6 @@
          </layout>
         </widget>
        </item>
-       <item>
-        <widget class="QGroupBox" name="groupBox_4">
-         <property name="title">
-          <string>preferences_import_export</string>
-         </property>
-         <layout class="QVBoxLayout" name="verticalLayout_11">
-          <item>
-           <widget class="QCheckBox" name="legacy_import_export">
-            <property name="sizePolicy">
-             <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
-              <horstretch>0</horstretch>
-              <verstretch>0</verstretch>
-             </sizepolicy>
-            </property>
-            <property name="text">
-             <string notr="true">Legacy import/export handling</string>
-            </property>
-           </widget>
-          </item>
-         </layout>
-        </widget>
-       </item>
        <item>
         <spacer name="verticalSpacer_3">
          <property name="orientation">
@@ -1293,7 +1271,6 @@
   <tabstop>useCurrent</tabstop>
   <tabstop>default_search_text</tabstop>
   <tabstop>ignore_accents_in_search</tabstop>
-  <tabstop>legacy_import_export</tabstop>
   <tabstop>syncMedia</tabstop>
   <tabstop>syncOnProgramOpen</tabstop>
   <tabstop>autoSyncMedia</tabstop>

qt/aqt/preferences.py

@@ -359,7 +359,6 @@ class Preferences(QDialog):
         )
         self.form.styleLabel.setVisible(not is_win)
         self.form.styleComboBox.setVisible(not is_win)
-        self.form.legacy_import_export.setChecked(self.mw.pm.legacy_import_export())
         qconnect(self.form.resetWindowSizes.clicked, self.on_reset_window_sizes)
 
         self.setup_language()
@@ -377,8 +376,6 @@ class Preferences(QDialog):
             self.mw.pm.setUiScale(newScale)
             restart_required = True
 
-        self.mw.pm.set_legacy_import_export(self.form.legacy_import_export.isChecked())
-
         if restart_required:
             showInfo(tr.preferences_changes_will_take_effect_when_you())
 

qt/aqt/profiles.py

@@ -636,7 +636,8 @@ create table if not exists profiles
         self.meta[f"{self.editor_key(mode)}TagsCollapsed"] = collapsed
 
     def legacy_import_export(self) -> bool:
-        return self.meta.get("legacy_import", False)
+        "Always returns False so users with this option enabled are not stuck on the legacy importer after the UI option is removed."
+        return False
 
     def set_legacy_import_export(self, enabled: bool) -> None:
         self.meta["legacy_import"] = enabled