chore: remove amp workspace settings (#1263)

It was outdated, can just stick with default settings. Additionally
removed cody codebase setting from vscode config.

Author: keegancsmith

.amp/settings.json

@@ -8,6 +8,5 @@
   "go.useLanguageServer": true,
   "gopls": {
     "local": "github.com/sourcegraph/src-cli"
-  },
-  "cody.codebase": "github.com/sourcegraph/src-cli",
+  }
 }