Revert "faft_cr50_pvt: add cr50:0.3.15 as a suite dependency"

This reverts commit 2695e5f24571d6f4828b0c325230d11547699c9c.

The cr50 version label isn't getting applied correctly. I'm going to revert this until we figure that out.

Original change's description:
> faft_cr50_pvt: add cr50:0.3.15 as a suite dependency
>
> Add 0.3.15 as a suite dependency, so tests will be skipped completely.
> Right now tests have to go though init, check the version, realize it's
> wrong, raise an error, and then run cleanup.
>
> BUG=none
> BRANCH=none
> TEST=none
>
> Change-Id: I3dcb5af6e2bc84f020f701112d69e29cf6e676f9
> Reviewed-on: https://chromium-review.googlesource.com/1565964
> Commit-Ready: Mary Ruthven <mruthven@chromium.org>
> Tested-by: Mary Ruthven <mruthven@chromium.org>
> Reviewed-by: Dana Goyette <dgoyette@chromium.org>

Bug: none
Change-Id: Ic5f42311431b1f469303d1818f445b8d3696096a
Reviewed-on: https://chromium-review.googlesource.com/1575981
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Mary Ruthven <mruthven@chromium.org>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
diff --git a/test_suites/control.faft_cr50_pvt b/test_suites/control.faft_cr50_pvt
index 6b39ed8..bd93bd0 100644
--- a/test_suites/control.faft_cr50_pvt
+++ b/test_suites/control.faft_cr50_pvt
@@ -31,7 +31,7 @@
 CR50_RELEASE_VERSION = '0.3.15'
 CR50_RELEASE_BID = '0:0:0'
 
-args_dict['suite_dependencies'] = 'cr50:pvt,cr50:%s' % CR50_RELEASE_VERSION
+args_dict['suite_dependencies'] = 'cr50:pvt'
 args_dict['name'] = 'faft_cr50_pvt'
 args_dict['add_experimental'] = True
 args_dict['job'] = job