Revert "Install Lua for macOS in the CI"

This reverts commit 419cb02dd5.

Conflicts:
	.github/workflows/c-cpp.yml

.github/workflows/c-cpp.yml

@@ -67,7 +67,6 @@ jobs:
         brew install automake
         brew install libtool
         brew install grep
-        brew install lua
         brew install swig
         brew install tcl-tk
     - name: bootstrap