ecdsa: drop outdated and unused recipe. (#11930)

Nothing uses these on-tree, and I can't find anything that ever did.
"git log --since=2016-02 -S ecdsa_" gives nothing (except unrelated
openssh hits).

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

dev-python/ecdsa/ecdsa-0.18.0.recipe

@@ -1,65 +0,0 @@
-SUMMARY="Pure python ECDSA implementation"
-DESCRIPTION="ECDSA is a module for python 2.6 (or higher) that implements \
-the ECDSA cryptographic signature library."
-HOMEPAGE="https://github.com/warner/python-ecdsa"
-COPYRIGHT="2010 Brian Warner"
-LICENSE="MIT"
-REVISION="1"
-SOURCE_URI="https://pypi.python.org/packages/source/e/ecdsa/ecdsa-$portVersion.tar.gz"
-CHECKSUM_SHA256="190348041559e21b22a1d65cee485282ca11a6f81d503fddb84d5017e9ed1e49"
-
-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
-		six_$pythonPackage
-		cmd:python$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
-}