Cleanup rust/ts interface a but more w new rustContext (#5848)

* do the rust side

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* cleanup ts side

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* updates

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* typo

Signed-off-by: Jess Frazelle <github@jessfraz.com>

---------

Signed-off-by: Jess Frazelle <github@jessfraz.com>

src/lang/modifyAst/deleteSelection.ts

@@ -8,7 +8,7 @@ import {
   rustContext,
 } from 'lib/singletons'
 import { err } from 'lib/trap'
-import { executeAst } from 'lang/langHelpers'
+import { executeAstMock } from 'lang/langHelpers'
 
 export const deletionErrorMessage =
   'Unable to delete selection. Please edit manually in code pane.'
@@ -29,11 +29,9 @@ export async function deleteSelectionPromise(
     return new Error(deletionErrorMessage)
   }
 
-  const testExecute = await executeAst({
+  const testExecute = await executeAstMock({
     ast: modifiedAst,
-    engineCommandManager,
-    rustContext,
-    isMock: true,
+    rustContext: rustContext,
   })
   if (testExecute.errors.length) {
     return new Error(deletionErrorMessage)