Plugins dialog: remove direct download option.

Since users have to trust plugin publishers, we should expect
the plugin to be signed by its author, and the user to verify
the signature before installing.

electrum/gui/qt/plugins_dialog.py

@@ -177,10 +177,7 @@ class PluginsDialog(WindowModalDialog, MessageBoxMixin):
         vbox.addWidget(scroll)
         add_button = QPushButton(_('Add'))
         add_button.setMinimumWidth(40)  # looks better on windows, no difference on linux
-        menu = QMenu()
-        menu.addAction(_('Local ZIP file'), self.add_plugin_dialog)
-        menu.addAction(_('Download ZIP file'), self.download_plugin_dialog)
-        add_button.setMenu(menu)
+        add_button.clicked.connect(self.add_plugin_dialog)
         vbox.addLayout(Buttons(add_button, CloseButton(self)))
         self.show_list()
 
@@ -271,28 +268,6 @@ class PluginsDialog(WindowModalDialog, MessageBoxMixin):
             if self.show_message(msg, buttons=buttons) or exit_dialog:
                 break
 
-    def download_plugin_dialog(self):
-        from .util import line_dialog
-        from electrum.util import UserCancelled
-        pubkey, salt = self.plugins.get_pubkey_bytes()
-        if not pubkey:
-            self.init_plugins_password()
-            return
-        url = line_dialog(self, 'url', _('Enter plugin URL'), _('Download'))
-        if not url:
-            return
-        coro = self.plugins.download_external_plugin(url)
-        try:
-            d = RunCoroutineDialog(self, _("Downloading plugin..."), coro)
-            path = d.run()
-        except UserCancelled:
-            return
-        except Exception as e:
-            self._logger.exception("")
-            self.show_error(f"{e}")
-            return
-        self._try_add_external_plugin_from_path(path)
-
     def add_plugin_dialog(self):
         pubkey, salt = self.plugins.get_pubkey_bytes()
         if not pubkey: