Don't actually install a specific ruby version

Compilation slows down the install too much, and very often projects
specify something specific.

install/ruby.sh

@@ -1,10 +1,6 @@
-if ! command -v ruby &>/dev/null; then
 # Install Ruby using gcc-14 for compatibility
 yay -S --noconfirm --needed gcc14
 mise settings set ruby.ruby_build_opts "CC=gcc-14 CXX=g++-14"
-  mise install ruby
-  mise use ruby -g
 
 # Trust .ruby-version
 mise settings add idiomatic_version_file_enable_tools ruby
-fi