ponscripter-sekai: delete

This formula no longer builds, is not under development that seems
to indicate that this will change, and currently is used very little.
as such, simply delete the formula as it no longer builds correctly.

Formula/ponscripter-sekai.rb

@@ -1,36 +0,0 @@
-class PonscripterSekai < Formula
-  desc "NScripter-like visual novel engine"
-  homepage "https://github.com/sekaiproject/ponscripter-fork"
-  url "https://github.com/sekaiproject/ponscripter-fork/archive/v0.0.6.tar.gz"
-  sha256 "b1ac4f2c01aae1ca68420ea5274307e4c6b3eb1b85272ec41c7fbf07239c48d2"
-  revision 2
-  head "https://github.com/sekaiproject/ponscripter-fork.git"
-
-  bottle do
-    cellar :any
-    sha256 "c7156bb0456f0103a990ee4ac311ee14a7067224d20d617bfdb76adf62cf314e" => :high_sierra
-    sha256 "e6cc3939e19ca41fbdd5d4385964beb6eca6a4efa7e92dd4095a06238f46fbf5" => :sierra
-    sha256 "8d29e912f4444fc4c7dc1bde505d0178dab297584e5b146692a23f8a0b16c4d5" => :el_capitan
-    sha256 "0621a360b7dfac4f685b8adc31ee23adfcaff330b45100516c26a2a79a884ff1" => :yosemite
-  end
-
-  depends_on "sdl2"
-  depends_on "sdl2_image"
-  depends_on "sdl2_mixer" => "with-smpeg2"
-  depends_on "libvorbis"
-  depends_on "smpeg2"
-  depends_on "freetype"
-
-  def install
-    # Disable building man pages
-    inreplace "configure", /.*install-man.*/, ""
-
-    system "./configure", "--prefix=#{prefix}",
-                          "--unsupported-compiler"
-    system "make", "install"
-  end
-
-  test do
-    system "#{bin}/ponscr", "-v"
-  end
-end