makeFontsConf: give up fontDirectories checks for now

This reverts e26188938c and 77487fe661
CC #3515.

pkgs/development/libraries/fontconfig/make-fonts-conf.nix

@@ -6,14 +6,6 @@ runCommand "fonts.conf"
     inherit fontDirectories;
   }
   ''
-    for fd in $fontDirectories;
-    do
-      if [ ! -d "$fd/share/fonts" ] && [ ! -d "$fd/lib/X11/fonts" ]; then
-        echo "ERROR: '$fd/' contains neither 'share/fonts/' nor 'lib/X11/fonts/'"
-        false
-      fi
-    done
-
     xsltproc --stringparam fontDirectories "$fontDirectories" \
       --stringparam fontconfig "${fontconfig}" \
       --path ${fontconfig}/share/xml/fontconfig \