Revert "flo: update prebuilt kernel"

Reverting recent kernel changes to track down stability issue.

Bug: 11324320

This reverts commit a200888ad31c0f6a02fbdf94c14da93353454561.
diff --git a/kernel b/kernel
deleted file mode 100644
index 6668d88..0000000
--- a/kernel
+++ /dev/null
Binary files differ