Remove spurious '@//' root workspace references

Test Plan: covered by tests

X-Origin-Diff: phab/D364
GitOrigin-RevId: 4425fa5756468685dfafaf87186bf12f7da455e8
diff --git a/core/build/linux_kernel/BUILD b/core/build/linux_kernel/BUILD
index 8827285..625dd5c 100644
--- a/core/build/linux_kernel/BUILD
+++ b/core/build/linux_kernel/BUILD
@@ -24,9 +24,9 @@
 genrule(
     name = "initramfs",
     srcs = [
-        "@//core/cmd/init",
-        "@//core/build/utils:mkfs.xfs",
-        "@//core/cmd/kube-controlplane",
+        "//core/cmd/init",
+        "//core/build/utils:mkfs.xfs",
+        "//core/cmd/kube-controlplane",
     ],
     outs = [
         "initramfs.cpio.lz4",
@@ -36,10 +36,10 @@
 dir /dev 0755 0 0
 nod /dev/console 0600 0 0 c 5 1
 nod /dev/null 0644 0 0 c 1 3
-file /init $(location @//core/cmd/init) 0755 0 0
+file /init $(location //core/cmd/init) 0755 0 0
 dir /bin 0755 0 0
-file /bin/mkfs.xfs $(location @//core/build/utils:mkfs.xfs) 0755 0 0
-file /bin/kube-controlplane $(location @//core/cmd/kube-controlplane) 0755 0 0
+file /bin/mkfs.xfs $(location //core/build/utils:mkfs.xfs) 0755 0 0
+file /bin/kube-controlplane $(location //core/cmd/kube-controlplane) 0755 0 0
 EOF
     """,
     tools = [