xen: Drop CONFIG_CC_HAS_UBSAN

All supported toolchains now have it.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

xen/Kconfig

@@ -37,10 +37,6 @@ config CC_HAS_VISIBILITY_ATTRIBUTE
 config CC_SPLIT_SECTIONS
 	bool
 
-# Compiler supports -fsanitize=undefined
-config CC_HAS_UBSAN
-	def_bool $(cc-option,-fsanitize=undefined)
-
 # Set code alignment.
 #
 # Allow setting on a boolean basis, and then convert such selection to an

xen/Kconfig.debug

@@ -98,7 +98,7 @@ config SCRUB_DEBUG
 
 config UBSAN
 	bool "Undefined behaviour sanitizer"
-	depends on HAS_UBSAN && CC_HAS_UBSAN
+	depends on HAS_UBSAN
 	help
 	  Enable undefined behaviour sanitizer. It uses compiler to insert code
 	  snippets so that undefined behaviours in C are detected during runtime.