pyopengl: drop outdated and unused recipe. (#11941)

This was broken before 8dec539418, and never
referenced on-tree since then (`git log --since=2020-03 -S pyopengl`
gives nothing except that commit).

Users should try to `pip install` this, if they need it.

dev-python/pyopengl/pyopengl-3.1.6.recipe

@@ -1,68 +0,0 @@
-SUMMARY="Common cross platform Python binding to OpenGL"
-DESCRIPTION="PyOpenGL is the most common cross platform Python binding to \
-OpenGL and related APIs.
-The binding is created using the standard ctypes library, and is provided \
-under an extremely liberal BSD-style Open-Source license."
-HOMEPAGE="https://pypi.org/project/PyOpenGL/"
-COPYRIGHT="1997-1998, 2004-2020 Mike C. Fletcher"
-LICENSE="BSD (3-clause)"
-REVISION="2"
-SOURCE_URI="https://files.pythonhosted.org/packages/5b/01/f8fd986bc7f456f1a925ee0239f0391838ade92cdb6e5b674ffb8b86cfd6/PyOpenGL-3.1.6.tar.gz"
-CHECKSUM_SHA256="8ea6c8773927eda7405bffc6f5bb93be81569a7b05c8cac50cd94e969dce5e27"
-SOURCE_DIR="PyOpenGL-$portVersion"
-
-ARCHITECTURES="any"
-
-PROVIDES="
-	$portName = $portVersion
-	"
-REQUIRES="
-	haiku
-	"
-
-BUILD_REQUIRES="
-	haiku_devel
-	"
-
-PYTHON_PACKAGES=(python39 python310)
-PYTHON_VERSIONS=(3.9 3.10)
-for i in "${!PYTHON_PACKAGES[@]}"; do
-	pythonPackage=${PYTHON_PACKAGES[i]}
-	pythonVersion=${PYTHON_VERSIONS[$i]}
-
-	eval "PROVIDES_${pythonPackage}=\"
-		${portName}_$pythonPackage = $portVersion
-		\""
-	eval "REQUIRES_$pythonPackage=\"
-		haiku
-		cmd:python$pythonVersion
-		\""
-	BUILD_REQUIRES+="
-		setuptools_$pythonPackage
-		"
-	BUILD_PREREQUIRES+="
-		cmd:python$pythonVersion
-	"
-done
-
-
-INSTALL()
-{
-	for i in "${!PYTHON_PACKAGES[@]}"; do
-		pythonPackage=${PYTHON_PACKAGES[i]}
-		pythonVersion=${PYTHON_VERSIONS[$i]}
-
-		python=python$pythonVersion
-		installLocation=$prefix/lib/$python/vendor-packages/
-		export PYTHONPATH=$installLocation:$PYTHONPATH
-
-		mkdir -p $installLocation
-		rm -rf build
-
-		$python setup.py build install \
-			--root=/ --prefix=$prefix
-
-		packageEntries  $pythonPackage \
-			$prefix/lib/python*
-	done
-}