fix(amazonq): remove the security scan command (#8107)

## Problem

We removed `/agents` in this PR but the security.scan command was not
removed:
- #8026

<img width="1206" height="56" alt="Screenshot 2025-09-29 at 10 45 22 AM"
src="https://github.com/user-attachments/assets/70db455a-8efe-43f3-94a9-629d094c6d29"
/>



## Solution
Remove left over code


## Testing

Tested and command was removed

---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: tsmithsz

packages/amazonq/package.json

@@ -593,12 +593,6 @@
                 "category": "%AWS.amazonq.title%",
                 "enablement": "aws.codewhisperer.connected"
             },
-            {
-                "command": "aws.amazonq.security.scan-statusbar",
-                "title": "%AWS.command.amazonq.security.scan%",
-                "category": "%AWS.amazonq.title%",
-                "enablement": "aws.codewhisperer.connected && !aws.isSageMaker"
-            },
             {
                 "command": "aws.amazonq.refactorCode",
                 "title": "%AWS.command.amazonq.refactorCode%",