yaml: Remove trust section from examples and tests

With 561ce6f4be ("Remove Notary and Content Trust") we
removed support for content trust. No need to have it
in the YAMLs either.

Signed-off-by: Rolf Neugebauer <rn@rneugeba.io>

test/cases/010_platforms/010_hyperkit/000_run_kernel+initrd/test.yml

@@ -8,6 +8,3 @@ onboot:
   - name: poweroff
     image: linuxkit/poweroff:afe4b3ab865afe1e3ed5c88e58f57808f4f5119f
     command: ["/bin/sh", "/poweroff.sh", "10"]
-trust:
-  org:
-    - linuxkit

test/cases/010_platforms/010_hyperkit/005_run_kernel+squashfs/test.yml

@@ -8,6 +8,3 @@ onboot:
   - name: poweroff
     image: linuxkit/poweroff:afe4b3ab865afe1e3ed5c88e58f57808f4f5119f
     command: ["/bin/sh", "/poweroff.sh", "10"]
-trust:
-  org:
-    - linuxkit

test/cases/010_platforms/010_hyperkit/010_acpi/test.yml

@@ -8,6 +8,3 @@ init:
 services:
   - name: acpid
     image: linuxkit/acpid:d2ddd88c7918466f875e7c5c3e527b51dfb0b0ea
-trust:
-  org:
-    - linuxkit