Remove cache from 'Release to Docker' workflow as unused (#681)

Author: ScottBrenner

.github/workflows/docker.yaml

@@ -1,4 +1,4 @@
-# Copyright 2023 LiveKit, Inc.
+# Copyright 2026 LiveKit, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -28,16 +28,6 @@ jobs:
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
-      - uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5
-        with:
-          path: |
-            ~/go/pkg/mod
-            ~/go/bin
-            ~/bin/protoc
-            ~/.cache
-          key: ${{ runner.os }}-sip-${{ hashFiles('**/go.sum') }}
-          restore-keys: ${{ runner.os }}-sip
-
       - name: Docker metadata
         id: docker-md
         uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf # v6