Remove Homebrew no-auto-update env var from CI

With the release of Homebrew 4, auto-update is supposed to be more
efficient now. By removing the HOMEBREW_NO_AUTO_UPDATE env var from CI,
this will make sure that all the packages that we link to in CI will be
up to date instead of whatever just happens to be installed on the CI
environment which can sometimes fluctuate.

Author: ychin

.github/actions/universal-package/action.yml

@@ -34,8 +34,6 @@ runs:
 
     - name: Install formula
       shell: bash
-      env:
-        HOMEBREW_NO_AUTO_UPDATE: '1'
       run: |
         echo '::group::Install formula'
         formula=${{ inputs.formula }}

.github/workflows/ci-macvim.yaml

@@ -115,8 +115,6 @@ jobs:
 
       - name: Install packages
         if: matrix.publish
-        env:
-          HOMEBREW_NO_AUTO_UPDATE: 1
         run: |
           brew install python3
           brew install ruby