fvp: remove unused tests.

commit@df30c4d08e6f1bc305f80b481f2c1267c2c5b934
removed ccn and gic600 tests temporarily when migrating from FVP's.

Newer FVP's 11.26 doesn't have this configuration to continue testing them on CI, after discussion we have decided to remove this configuration from testing due to no model configuration available going forward.

Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
Change-Id: I0d0083170f30ef82f0e89155aa9d38cf8e7d5197
8 files changed