Fix lint issues

lib/src/core/buffer/buffer.dart

@@ -551,8 +551,6 @@ class Buffer {
 
       builder.write('${i.toString().padLeft(lineNumberLength)}: |${lines[i]}|');
 
-      TextEditingValue;
-
       if (line.isWrapped) {
         builder.write(' (⏎)');
       }

lib/src/ui/shortcut/actions.dart

@@ -21,8 +21,6 @@ class TerminalActions extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    TextEditingController;
-
     return Actions(
       actions: {
         PasteTextIntent: CallbackAction<PasteTextIntent>(