Change zsh theme

Custom theme is very minimal and has little info about your whereabouts
on the server. "bira" theme set as default.

Custom theme wasn't removed, just commented-out.

configs/zshrc

@@ -2,7 +2,8 @@ export ZSH="$HOME/.oh-my-zsh"
 export ALIASES="$HOME/.config/aliases"
 export CT_DIR="$HOME/.config/custom_tools"
 export EDITOR="vim"
-ZSH_THEME=""
+# ZSH_THEME=""
+ZSH_THEME="bira"
 DISABLE_AUTO_TITLE="true"
 plugins=(
   git
@@ -11,7 +12,7 @@ plugins=(
   z
 )
 source $ZSH/oh-my-zsh.sh
-source $HOME/.config/zsh/zhann-elvis.zsh-theme
+# source $HOME/.config/zsh/zhann-elvis.zsh-theme
 source $ALIASES/.aliases
 autoload -Uz zcalc
 [ -f /usr/share/doc/fzf/examples/key-bindings.zsh ] && source /usr/share/doc/fzf/examples/key-bindings.zsh