remove unnecessary chruby initialization

runcoms/zshenv

@@ -10,13 +10,6 @@ if [[ ( "$SHLVL" -eq 1 && ! -o LOGIN ) && -s "${ZDOTDIR:-$HOME}/.zprofile" ]]; t
   source "${ZDOTDIR:-$HOME}/.zprofile"
 fi
 
-if command -v brew &> /dev/null; then
-  if [[ -s `brew --prefix`/share/chruby/chruby.sh ]]; then
-    source `brew --prefix`/share/chruby/chruby.sh
-    source `brew --prefix`/share/chruby/auto.sh
-  fi
-fi
-
 if command -v direnv &> /dev/null; then
   eval "$(direnv hook zsh)"
 fi