Remove built-in.o from repository

Added by mistake when pflash was originally imported.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/op-flasher/pflash/ccan/built-in.o b/op-flasher/pflash/ccan/built-in.o
deleted file mode 100644
index 510b477..0000000
--- a/op-flasher/pflash/ccan/built-in.o
+++ /dev/null
Binary files differ