cc: Don't set `selectedSection` to 'attack' in `componentDidMount` in `ConfigurePage.js`

Remove a line which seems to do nothing useful.
Causes issues if the first tab in the configuration page
is not the ATT&CK tab.

monkey/monkey_island/cc/ui/src/components/pages/ConfigurePage.js

@@ -83,8 +83,7 @@ class ConfigurePageComponent extends AuthComponent {
           schema: monkeyConfig.schema,
           configuration: monkeyConfig.configuration,
           attackConfig: attackConfig.configuration,
-          sections: sections,
-          selectedSection: 'attack'
+          sections: sections
         })
       });
   };