dev-python/pure-protobuf: patch exclude variable in setup.py

we used the python_foreach_impl function wrong

python_install is already run with python_foreach_impl,
thus the function should not be used inside python_install

for this there is python_install_all, but this is run after
python_foreach_impl python_install so we again get the
'${P} installs tests' error. Instead I just patched
a fix, this fix is also already in upstream master

Package-Manager: Portage-2.3.99, Repoman-2.3.22
Signed-off-by: Andrew Ammerlaan <andrewammerlaan@riseup.net>

dev-python/pure-protobuf/pure-protobuf-2.0.0-r1.ebuild

@@ -22,11 +22,4 @@ S="${WORKDIR}/protobuf-${PV}"
 
 distutils_enable_tests pytest
 
-python_install() {
-	# Package installs 'tests' package which is forbidden and likely a bug in the build system.
-	rm -r tests || die
-
-	# Previously it did not actually install any python libs
-	python_foreach_impl esetup.py install
-	python_foreach_impl python_optimize
-}
+PATCHES="${FILESDIR}/${PN}-do-not-install-tests.patch"