Revert "ANDROID: add support for Clang's Control Flow Integrity (CFI)"

This reverts commit fa91466f31 as CFI is
being removed from the tree to come back later as a "clean" set of
patches.

Bug: 145210207
Cc: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I37cca753c39eef4c6fcef20e38d4f01fe78b4dee

include/linux/module.h

@@ -25,7 +25,6 @@
 #include <linux/error-injection.h>
 #include <linux/tracepoint-defs.h>
 #include <linux/srcu.h>
-#include <linux/cfi.h>
 
 #include <linux/percpu.h>
 #include <asm/module.h>
@@ -379,10 +378,6 @@ struct module {
 	const s32 *crcs;
 	unsigned int num_syms;
 
-#ifdef CONFIG_CFI_CLANG
-	cfi_check_fn cfi_check;
-#endif
-
 	/* Kernel parameters. */
 #ifdef CONFIG_SYSFS
 	struct mutex param_lock;