ci: remove unnecessary ffmpeg setup (#607)

Author: Kikobeats

.github/workflows/main.yml

@@ -57,8 +57,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Setup ffmpeg
-        uses: FedericoCarboni/setup-ffmpeg@v3
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:

.github/workflows/pull_request.yml

@@ -32,8 +32,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Setup ffmpeg
-        uses: FedericoCarboni/setup-ffmpeg@v3
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with: