ci:remove pre-install pkg-config

.github/workflows/cleanup.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+set -e
+
+if pkg=$(brew list | grep -E "pkg-config"); then
+    brew uninstall "$pkg" || true
+fi

.github/workflows/doc.yml

@@ -43,7 +43,7 @@ jobs:
         run: |
           set -e
           set -x
-          brew uninstall pkg-config@0.29.2
+          bash .github/workflows/cleanup.sh
           source doc/_readme/scripts/install_macos.sh
 
       - name: Install dependencies on Ubuntu

.github/workflows/go.yml

@@ -41,7 +41,7 @@ jobs:
       - name: Install dependencies
         if: startsWith(matrix.os, 'macos')
         run: |
-          brew uninstall pkg-config@0.29.2
+          bash .github/workflows/cleanup.sh
           brew update
           brew install llvm@${{matrix.llvm}} pkg-config bdw-gc openssl libffi
           echo "$(brew --prefix llvm@${{matrix.llvm}})/bin" >> $GITHUB_PATH