Remove repo gitlink

It doesn't have .gitmodules entry and was accidentally committed.

Change-Id: Ic50c52024b1400a6c3f1e6922dc40db572acf99a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/moblab/+/4901862
Auto-Submit: Josip Sokcevic <sokcevic@chromium.org>
Commit-Queue: Michal Matyjek <mmatyjek@google.com>
Reviewed-by: George Engelbrecht <engeg@google.com>
Reviewed-by: Michal Matyjek <mmatyjek@google.com>
Tested-by: Josip Sokcevic <sokcevic@chromium.org>
diff --git a/src/.repo/repo b/src/.repo/repo
deleted file mode 160000
index 28eb806..0000000
--- a/src/.repo/repo
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 28eb806df7d67aa7c4a605aba34e5f3db708653b