Remove fixedfunction from test where it is out-of-scope

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

test-cases/grilo.yaml

@@ -2,7 +2,6 @@ metadata:
   name: grilo
   format: "Apertis Test Definition 1.0"
   image-types:
-    fixedfunction: [ armhf-internal, armhf, arm64, amd64 ]
     target:        [ armhf, amd64 ]
     basesdk:       [ amd64 ]
     sdk:           [ amd64 ]

test-cases/gupnp-services.yaml

@@ -2,7 +2,6 @@ metadata:
   name: gupnp-services
   format: "Apertis Test Definition 1.0"
   image-types:
-    fixedfunction: [ armhf-internal, armhf, arm64, amd64 ]
     target:        [ armhf, amd64 ]
     basesdk:       [ amd64 ]
     sdk:           [ amd64 ]