Fix unused variable warning (#2234)

## Checklist

- [-] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [-] I have updated the
[docs](https://github.com/cursorless-dev/cursorless/tree/main/docs) and
[cheatsheet](https://github.com/cursorless-dev/cursorless/tree/main/cursorless-talon/src/cheatsheet)
- [-] I have not broken the cheatsheet

Author: pokey

packages/cursorless-engine/src/test/fixtures/talonApi.fixture.ts

@@ -93,10 +93,6 @@ const wrapWithSnippetByNameAction: ActionDescriptor = {
     variableName: "body",
   },
 };
-const parseTreeAction: ActionDescriptor = {
-  name: "private.showParseTree",
-  target: decoratedPrimitiveTarget("a"),
-};
 const alternateHighlightAirAndBatAction: ActionDescriptor = {
   name: "highlight",
   target: {