tests: Remove functional tests from Garnet

Garnet doesn't support functional reads. We were getting lucky in our
tests that no functional reads were going to the network. This change
removes the functional read check from the garnet-specific Ruby random
test.

Change-Id: I9c12c4aaab662555a1de58b73813118914ee495f
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/62431
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

tests/gem5/memory/test.py

@@ -76,8 +76,6 @@ null_tests = [
         [
             "--abs-max-tick",
             "20000000",
-            "--functional",
-            "10",
             "--network=garnet",
         ],
     ),