fix(templates): remove unused deps from Strands TS package.json

Remove @aws-sdk/client-s3, express, and zod — none are imported by
the template code. Reduces install size and avoids zod version conflicts
with VercelAI templates.

Confidence: high
Scope-risk: narrow

Author: jesseturner21

src/assets/__tests__/__snapshots__/assets.snapshot.test.ts.snap

@@ -5909,13 +5909,10 @@ exports[`Assets Directory Snapshots > TypeScript assets > typescript/typescript/
     {{#if (eq modelProvider "Gemini")}}
     "@google/genai": "^1.40.0",
     {{/if}}
-    "@aws-sdk/client-s3": "^3.943.0",
     "@modelcontextprotocol/sdk": "^1.25.2",
     "@strands-agents/sdk": "1.0.0-rc.4",
     "bedrock-agentcore": "^0.2.4",
-    "express": "^5.1.0",
-    "tsx": "^4.19.0",
-    "zod": "^4.1.12"
+    "tsx": "^4.19.0"
   },
   "devDependencies": {
     "@types/node": "^22.0.0",

src/assets/typescript/http/strands/base/package.json

@@ -19,13 +19,10 @@
     {{#if (eq modelProvider "Gemini")}}
     "@google/genai": "^1.40.0",
     {{/if}}
-    "@aws-sdk/client-s3": "^3.943.0",
     "@modelcontextprotocol/sdk": "^1.25.2",
     "@strands-agents/sdk": "1.0.0-rc.4",
     "bedrock-agentcore": "^0.2.4",
-    "express": "^5.1.0",
-    "tsx": "^4.19.0",
-    "zod": "^4.1.12"
+    "tsx": "^4.19.0"
   },
   "devDependencies": {
     "@types/node": "^22.0.0",