Remove unnecessary package

Since ncurses now builds and installs the shared libraries the
ncurses_so package is no longer needed.

packages/ncurses_so.rb

-require 'package'
-
-class Ncurses_so < Package
-  version '5.9'
-  source_url 'ftp://ftp.gnu.org/pub/gnu/ncurses/ncurses-5.9.tar.gz'
-  source_sha1 '3e042e5f2c7223bffdaac9646a533b8c758b65b5'
-
-  depends_on "ncurses"
-
-  def self.build
-    system "./configure --prefix=/usr/local \"CFLAGS= -fPIC\" --without-debug --without-normal --with-shared"
-    system "make"
-  end
-
-  def self.install
-    out = "#{CREW_DEST_DIR}/usr/local/lib"
-    system "mkdir -p #{out}"
-    ["form", "menu", "ncurses", "panel"].each do |lib|
-      system "cp", "lib/lib#{lib}.so.5.9", out
-      FileUtils.cd(out) do
-        system "ln -s lib#{lib}.so.5.9 lib#{lib}.so"
-        system "ln -s lib#{lib}.so.5.9 lib#{lib}.so.5"
-      end
-    end
-    FileUtils.cd(out) do
-      system "ln -s libncurses.so.5.9 libtinfo.so.5.9"
-      system "ln -s libncurses.so.5 libtinfo.so.5"
-      system "ln -s libncurses.so libtinfo.so"
-    end
-  end
-end