Disable zsh COMPLETION_WAITING_DOTS

This conflicts with the fzf-tab plugin causing the prompt to scroll up
unexpectedly (see Aloxaf/fzf-tab#236)

zsh/zshrc

@@ -7,9 +7,6 @@ export XDG_CONFIG_HOME="$HOME/.config"
 # Enable command auto-correction.
 ENABLE_CORRECTION=true
 
-# Uncomment the following line to display red dots whilst waiting for completion.
-COMPLETION_WAITING_DOTS=true
-
 # Which plugins would you like to load? (plugins can be found in ~/.oh-my-zsh/plugins/*)
 # Custom plugins may be added to ~/.oh-my-zsh/custom/plugins/
 # Example format: plugins=(rails git textmate ruby lighthouse)