Clean up appearance lib file and redundant colors calls in other files

plugins/git-prompt/git-prompt.plugin.zsh

@@ -2,9 +2,6 @@
 # http://github.com/olivierverdier/zsh-git-prompt
 #
 export __GIT_PROMPT_DIR=$ZSH/plugins/git-prompt
-# Initialize colors.
-autoload -U colors
-colors
 
 # Allow for functions in the prompt.
 setopt PROMPT_SUBST

plugins/jump/jump.plugin.zsh

@@ -27,7 +27,6 @@ unmark() {
 	rm -i "$MARKPATH/$1"
 }
 
-autoload colors
 marks() {
 	for link in $MARKPATH/*(@); do
 		local markname="$fg[cyan]${link:t}$reset_color"