app-shells/bash: remove egrep/fgrep aliases from bashrc

Upstream has declared these forms to be deprecated. Aliasing them to
'grep -E' and 'grep -F' prevents the deprecation warning from being
displayed, which could lead to confusion.

Bug: https://bugs.gentoo.org/869788
Signed-off-by: Mike Gilbert <floppym@gentoo.org>

app-shells/bash/files/bashrc

@@ -94,8 +94,6 @@ if ${use_color} ; then
 	#BSD#@export CLICOLOR=1
 	#GNU#@alias ls='ls --color=auto'
 	alias grep='grep --colour=auto'
-	alias egrep='grep -E --colour=auto'
-	alias fgrep='grep -F --colour=auto'
 else
 	# show root@ when we don't have colors
 	PS1+='\u@\h \w \$ '