package/ne10: drop arch-related comment

Commit e845f936 ("ne10: bump to v1.2.1") removed arm arch
dependency from the comment. This comment is only relevant to arm.

Furthermore, if a target does not have a NEON unit, there is
nothing a user can do about that condition in Buildroot. Showing
a comment would not be useful, and we're not usually showing any
arch-related comment.

Cc: Cody Guldner <cody.guldner@rockwellcollins.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
[yann.morin.1998@free.fr: drop the comment, explain why]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>