Remove CRYPT_FOOTER_OFFSET

This is no longer used.

Bug: 191796797
Change-Id: If1e9e3ad255714c37a8c1f292823f181eab7a1ce
diff --git a/cryptfs.h b/cryptfs.h
index 1cae5b7..e166f49 100644
--- a/cryptfs.h
+++ b/cryptfs.h
@@ -22,10 +22,6 @@
 #include "KeyBuffer.h"
 #include "KeyUtil.h"
 
-// TODO(b/191796797): remove this once it is no longer referenced by system/core
-// and bootable/recovery.
-#define CRYPT_FOOTER_OFFSET 0x4000
-
 int cryptfs_setup_ext_volume(const char* label, const char* real_blkdev,
                              const android::vold::KeyBuffer& key, std::string* out_crypto_blkdev);
 const android::vold::KeyGeneration cryptfs_get_keygen();