Adjust $HISTFILE settings

- remove the environment variables
- remove the `setopt`s
- both are replaced with options in ~/.zshrc
  (See: https://gitlab.webartifex.biz/alexander/dotfiles)

lib/history.zsh

@@ -33,16 +33,3 @@ case ${HIST_STAMPS-} in
   "") alias history='omz_history' ;;
   *) alias history="omz_history -t '$HIST_STAMPS'" ;;
 esac
-
-## History file configuration
-[ -z "$HISTFILE" ] && HISTFILE="$HOME/.zsh_history"
-[ "$HISTSIZE" -lt 50000 ] && HISTSIZE=50000
-[ "$SAVEHIST" -lt 10000 ] && SAVEHIST=10000
-
-## History command configuration
-setopt extended_history       # record timestamp of command in HISTFILE
-setopt hist_expire_dups_first # delete duplicates first when HISTFILE size exceeds HISTSIZE
-setopt hist_ignore_dups       # ignore duplicated commands history list
-setopt hist_ignore_space      # ignore commands that start with space
-setopt hist_verify            # show command with history expansion to user before running it
-setopt share_history          # share command history data