Fix platform2 duplicate

BUG=b/465833194
TEST=init and sync

Change-Id: I5983c64307670ebae2ffd7ef1497d42b33cc5e63
Reviewed-on: https://cos-review.googlesource.com/c/cos/manifest/+/120668
Tested-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Reviewed-by: Miri Amarilio <mirilio@google.com>

external_full.xml

diff --git a/external_full.xml b/external_full.xml
index 31b5916..fa55fcb 100644
--- a/external_full.xml
+++ b/external_full.xml
@@ -57,9 +57,6 @@
   <project path="src/third_party/modp_b64"
            name="mirrors/cros/aosp/platform/external/modp_b64"
            revision="68a503fff7af8fbf6f78cd496830813d41150817" />
-  <project path="src/platform2"
-           name="mirrors/cros/chromiumos/platform2"
-           revision="1b80b9f8ef7560d3a86dfef432eafe20bc756cf9" />
   <project path="infra_virtualenv"
            name="mirrors/cros/chromiumos/infra_virtualenv"
            revision="39254f97db8d6ab8b3fdef3d2f7038ac42978b78" />