Dockerfile.e2e: remove redundant INSTALL_BINARY_NAME
Dockerfile.e2e: remove redundant INSTALL_BINARY_NAME

It's only used in a single place, so may as well just hard-code it

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

jimjag/docker,moby/moby,cpuguy83/docker,thaJeztah/docker,moul/docker,konstruktoid/docker-upstream,cpuguy83/docker,moby/moby,nawawi/docker,Ramzec/docker,moby/moby,trebonian/docker,mahak/docker,moby/moby,konstruktoid/docker-upstream,nawawi/docker,Mokolea/docker,Mokolea/docker,trebonian/docker,cpuguy83/docker,moul/docker,trebonian/docker,konstruktoid/docker-upstream,jimjag/docker,thaJeztah/docker,cpuguy83/docker,Ramzec/docker,nawawi/docker,mahak/docker,thaJeztah/docker,Ramzec/docker,Mokolea/docker,moul/docker,jimjag/docker,mahak/docker,Mokolea/docker,thaJeztah/docker,nawawi/docker,konstruktoid/docker-upstream,jimjag/docker,Ramzec/docker,trebonian/docker,moul/docker,mahak/docker