diff --git a/Formula/ignition-math3.rb b/Formula/ignition-math3.rb
deleted file mode 100644
index 89abab393..000000000
--- a/Formula/ignition-math3.rb
+++ /dev/null
@@ -1,51 +0,0 @@
-class IgnitionMath3 < Formula
-  desc "Math API for robotic applications"
-  homepage "https://ignitionrobotics.org"
-  url "https://osrf-distributions.s3.amazonaws.com/ign-math/releases/ignition-math3-3.3.0.tar.bz2"
-  sha256 "97bb7f20b64c9a281873ac6fd02932390ca9a0d5709256e671c4db4221a8e051"
-  license "Apache-2.0"
-
-  head "https://github.com/gazebosim/gz-math.git", branch: "ign-math3"
-
-  bottle do
-    root_url "https://osrf-distributions.s3.amazonaws.com/ign-math/releases"
-    sha256 cellar: :any, mojave:      "958ed00cd402ba76a8095adb3aa804243b553b126b60882cd7162dc60d6098d1"
-    sha256 cellar: :any, high_sierra: "79f35d471b53743a1a8ad5d40d64014ef732247312c8b8cb22ce83b40783e945"
-    sha256 cellar: :any, sierra:      "34c194270aa0e1dbf44a11e18313ce986ef7654745e1d01689a73b7a53507720"
-    sha256 cellar: :any, el_capitan:  "4f35a563ed082a2c3e72be81b574495eb4d430541bce5323526a4faf6356455c"
-    sha256 cellar: :any, yosemite:    "360b5673f882a817cb0e576b2778c8665d27f0671d34eaa188f30873221da058"
-  end
-
-  disable! date: "2023-02-28", because: "is past end-of-life date"
-  deprecate! date: "2019-09-01", because: "is past end-of-life date"
-
-  depends_on "cmake" => :build
-  depends_on "doxygen" => :build
-
-  conflicts_with "ignition-math2", because: "symbols collision between the two libraries"
-
-  def install
-    system "cmake", ".", *std_cmake_args
-    system "make", "install"
-  end
-
-  test do
-    (testpath/"test.cpp").write <<-EOS
-      #include "ignition/math/SignalStats.hh"
-      int main() {
-        ignition::math::SignalMean mean;
-        mean.InsertData(1.0);
-        mean.InsertData(-1.0);
-        return static_cast<int>(mean.Value());
-      }
-    EOS
-    system ENV.cc, "test.cpp",
-                   "--std=c++11",
-                   "-I#{include}/ignition/math3",
-                   "-L#{lib}",
-                   "-lignition-math3",
-                   "-lc++",
-                   "-o", "test"
-    system "./test"
-  end
-end
diff --git a/Formula/sdformat4.rb b/Formula/sdformat4.rb
deleted file mode 100644
index 22a0a0649..000000000
--- a/Formula/sdformat4.rb
+++ /dev/null
@@ -1,73 +0,0 @@
-class Sdformat4 < Formula
-  desc "Simulation Description Format"
-  homepage "http://sdformat.org"
-  url "https://osrf-distributions.s3.amazonaws.com/sdformat/releases/sdformat-4.4.0.tar.bz2"
-  sha256 "4424a984f69d3333f087e7aae1d8fa5aec61ad52e09be39e2f5e2cb69ade1527"
-  license "Apache-2.0"
-  revision 6
-
-  head "https://github.com/osrf/sdformat.git", branch: "sdf4", using: :git
-
-  disable! date: "2023-02-28", because: "is past end-of-life date"
-  deprecate! date: "2019-09-01", because: "is past end-of-life date"
-
-  depends_on "cmake" => :build
-
-  depends_on "boost"
-  depends_on "doxygen"
-  depends_on "ignition-math2"
-  depends_on "pkg-config"
-  depends_on "tinyxml"
-  depends_on "urdfdom" => :optional
-
-  conflicts_with "sdformat6", because: "differing version of the same formula"
-
-  def install
-    cmake_args = std_cmake_args
-    cmake_args << "-DUSE_EXTERNAL_URDF:BOOL=True" if build.with? "urdfdom"
-    cmake_args << ".."
-
-    mkdir "build" do
-      system "cmake", *cmake_args
-      system "make", "install"
-    end
-  end
-
-  test do
-    (testpath/"test.cpp").write <<-EOS
-      #include <iostream>
-      #include "sdf/sdf.hh"
-      const std::string sdfString(
-        "<sdf version='1.5'>"
-        "  <model name='example'>"
-        "    <link name='link'>"
-        "      <sensor type='gps' name='mysensor' />"
-        "      <sensor type='imu' name='imu'>"
-        "        <imu>"
-        "          <noise/>"
-        "        </imu>"
-        "      </sensor>"
-        "    </link>"
-        "  </model>"
-        "</sdf>");
-      int main() {
-        sdf::SDF modelSDF;
-        modelSDF.SetFromString(sdfString);
-        std::cout << modelSDF.ToString() << std::endl;
-      }
-    EOS
-    system "pkg-config", "sdformat"
-    cflags = `pkg-config --cflags sdformat`.split
-    libs = `pkg-config --libs sdformat`.split
-    system ENV.cc, "test.cpp",
-                   *cflags,
-                   "-L#{lib}",
-                   *libs,
-                   "-lc++",
-                   "-o", "test"
-    system "./test"
-    # check for Xcode frameworks in bottle
-    cmd_not_grep_xcode = "! grep -rnI 'Applications[/]Xcode' #{prefix}"
-    system cmd_not_grep_xcode
-  end
-end