component/{firefox,phantomjs}: don't install fonts

Users will need to generate a proper fonts.conf and set it as
$FONTCONFIG_FILE environment variable.

component/firefox/buildout.cfg

@@ -110,9 +110,6 @@ slapos_promise =
 x86 = https://download-installer.cdn.mozilla.net/pub/firefox/releases/${:version}/linux-i686/en-US/firefox-${:version}.tar.bz2 ${:i686-md5sum}
 x86-64 = https://download-installer.cdn.mozilla.net/pub/firefox/releases/${:version}/linux-x86_64/en-US/firefox-${:version}.tar.bz2 ${:x86_64-md5sum}
 
-fonts =
-  ${liberation-fonts:location}
-  ${ipaex-fonts:location}
 library =
   ${alsa:location}/lib
   ${atk:location}/lib

component/phantomjs/buildout.cfg

@@ -10,10 +10,6 @@ recipe = slapos.recipe.build
 slapos_promise =
   file:phantomjs-slapos
 
-depends =
-  ${liberation-fonts:location}
-  ${ipaex-fonts:location}
-
 x86 = https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-1.9.7-linux-i686.tar.bz2 9c1426eef5b04679d65198b1bdd6ef88
 x86-64 = https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-1.9.7-linux-x86_64.tar.bz2 f278996c3edd0e8d8ec4893807f27d71