Remove unnecessary HSTR configuration from .zshrc

.zshrc

@@ -196,14 +196,3 @@ setopt HIST_SAVE_NO_DUPS
 setopt HIST_REDUCE_BLANKS
 setopt INC_APPEND_HISTORY
 setopt HIST_EXPIRE_DUPS_FIRST
-
-# HSTR configuration - add this to ~/.zshrc
-alias hh=hstr                    # hh to be alias for hstr
-setopt histignorespace           # skip cmds w/ leading space from history
-export HSTR_CONFIG=hicolor       # get more colors
-bindkey -s "\C-r" "\C-a hstr -- \C-j"     # bind hstr to Ctrl-r (for Vi mode check doc)
-export HSTR_TIOCSTI=y
-export HISTCONTROL=ignorespace   # leading space commands do not go to history
-
-# sync history
-export PROMPT_COMMAND="history -a; history -n; ${PROMPT_COMMAND}"