Switch from oh-my-zsh to zplug

shell/zsh/custom/plugins/peco-history/peco-history.plugin.zsh

@@ -1,19 +0,0 @@
-# History search with peco
-#
-# Search shell history with peco: https://github.com/peco/peco
-# Adapted from: https://github.com/mooz/percol#zsh-history-search
-if which peco &> /dev/null; then
-  function peco_select_history() {
-    local tac
-    (which gtac &> /dev/null && tac="gtac") || \
-      (which tac &> /dev/null && tac="tac") || \
-      tac="tail -r"
-    BUFFER=$(fc -l -n 1 | eval $tac | \
-                peco --layout=bottom-up --query "$LBUFFER")
-    CURSOR=$#BUFFER # move cursor
-    zle -R -c       # refresh
-  }
-
-  zle -N peco_select_history
-  bindkey '^R' peco_select_history
-fi