Remove positions from web cheatsheet (#1740)

I confirmed they don't show up locally, so just need to remove them here

## 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/cheatsheet/src/lib/sampleSpokenFormInfos/defaults.json

@@ -1040,52 +1040,6 @@
         }
       ]
     },
-    {
-      "name": "Positions",
-      "id": "positions",
-      "items": [
-        {
-          "id": "after",
-          "type": "position",
-          "variations": [
-            {
-              "spokenForm": "after",
-              "description": "After"
-            }
-          ]
-        },
-        {
-          "id": "before",
-          "type": "position",
-          "variations": [
-            {
-              "spokenForm": "before",
-              "description": "Before"
-            }
-          ]
-        },
-        {
-          "id": "end",
-          "type": "position",
-          "variations": [
-            {
-              "spokenForm": "end of",
-              "description": "End"
-            }
-          ]
-        },
-        {
-          "id": "start",
-          "type": "position",
-          "variations": [
-            {
-              "spokenForm": "start of",
-              "description": "Start"
-            }
-          ]
-        }
-      ]
-    },
     {
       "name": "Scope visualizer",
       "id": "scopeVisualizer",