fix redundant env

Author: XueSongTap

.github/workflows/ci-linux.yml

@@ -171,10 +171,6 @@ jobs:
 
   gcc-bazel-unittest:
     runs-on: ubuntu-22.04
-    env:
-      HTTP_PROXY: http://127.0.0.1:7890  # 假设代理端口是7890
-      HTTPS_PROXY: http://127.0.0.1:7890
-      NO_PROXY: localhost,127.0.0.1
     steps:
     - uses: actions/checkout@v2
     # - uses: bazelbuild/setup-bazelisk@v2