Remove deprecated syntax (#6561)

* Remove deprecated syntax

Signed-off-by: Nick Cameron <nrc@ncameron.org>

* fix one test

* fix sketch on revolved face test

* fix test: empty-scene default-planes act as expected

* fix up more tests

* another fix

* remove another const

---------

Signed-off-by: Nick Cameron <nrc@ncameron.org>
Co-authored-by: Kurt Hutten Irev-Dev <k.hutten@protonmail.ch>

src/components/ModelingSidebar/ModelingPanes/MemoryPane.test.tsx

@@ -12,7 +12,7 @@ describe('processMemory', () => {
     // Enable rotations #152
     const code = `
   myVar = 5
-  fn myFn = (a) => {
+  fn myFn(a) {
     return a - 2
   }
   otherVar = myFn(5)