docs: drop kbsim fetch script from setup

Sample assets are committed in assets/ with attribution in the README,
so the fetch script and git prerequisite are no longer needed.

Co-authored-by: Cursor <cursoragent@cursor.com>

README.md

@@ -11,7 +11,6 @@ sfxkeeb is a **Wails v3 desktop app** (Go shell + Svelte frontend). Native file
 - **Go** 1.22+
 - **Wails v3 CLI**: `go install github.com/wailsapp/wails/v3/cmd/wails3@latest`
 - **Node.js** 18+ and npm
-- **git** (to fetch kbsim sample assets)
 
 ### Platform tooling
 
@@ -23,11 +22,7 @@ sfxkeeb is a **Wails v3 desktop app** (Go shell + Svelte frontend). Native file
 ## Setup
 
 ```bash
-# Frontend dependencies
 cd frontend && npm install
-
-# Download kbsim switch samples (~151 MP3 files)
-cd .. && ./scripts/fetch_kbsim_samples.sh
 ```
 
 ## Development