chore(build-brainscales): drop hack

packages/build-brainscales/package.py

@@ -18,9 +18,6 @@ class BuildBrainscales(WafPackage):
     depends_on('git', type=('build', 'link'))
     depends_on('py-git-review', type=('build', 'link'))
 
-    # hack to provide genpybind PATH in all brainscales-style builds
-    depends_on('genpybind@ebrains', type=('build', 'link'))
-
     def do_fetch(self, mirror_only=False):
         """Setup the project."""