dominant eigenvector example: remove Grassmannian
dominant eigenvector example: remove Grassmannian

Signed-off-by: Niklas Koep <342d5290239d9c5264c8f98185afedb99596601a@gmail.com>

nkoep/pymanopt,pymanopt/pymanopt,nkoep/pymanopt,nkoep/pymanopt,pymanopt/pymanopt,tingelst/pymanopt,j-towns/pymanopt