libproxy: remove dependency on X libs

Nothing in the source refers to libX11 or libXmu so there would appear to be
no good reason for them to be in DEPENDS.  It looks as though these are perhaps
a relic from an earlier version which did need those libraries.

(From OE-Core rev: 5d0b45c982b92eecde48cc10dd095927fa38a047)

Signed-off-by: Phil Blundell <philb@gnu.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/libproxy/libproxy_0.4.6.bb

@@ -7,7 +7,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=7d7044444a7b1b116e8783edcdb44ff4 \
                     file://utils/proxy.c;beginline=1;endline=18;md5=55152a1006d7dafbef32baf9c30a99c0"
 
 
-DEPENDS = "virtual/libx11 xmu gconf"
+DEPENDS = "gconf"
 
 SRC_URI = "http://libproxy.googlecode.com/files/libproxy-${PV}.tar.gz"