Bug 1915847 - Remove unused set_config and set_define for MOZ_SIGNED_…

…OVERFLOW_SANITIZE and MOZ_UNSIGNED_OVERFLOW_SANITIZE from configure r=glandium

Differential Revision: https://phabricator.services.mozilla.com/D220698

UltraBlame original commit: fe75c58ea3e0f3cc53860f743b4d73dc06901009

build/moz.configure/toolchain.configure

@@ -18114,26 +18114,6 @@ rdynamic
 "
 ]
 )
-set_define
-(
-"
-MOZ_SIGNED_OVERFLOW_SANITIZE
-"
-True
-when
-=
-ub_signed_overflow_san
-)
-set_config
-(
-"
-MOZ_SIGNED_OVERFLOW_SANITIZE
-"
-True
-when
-=
-ub_signed_overflow_san
-)
 option
 (
 "
@@ -18303,26 +18283,6 @@ rdynamic
 "
 ]
 )
-set_define
-(
-"
-MOZ_UNSIGNED_OVERFLOW_SANITIZE
-"
-True
-when
-=
-ub_unsigned_overflow_san
-)
-set_config
-(
-"
-MOZ_UNSIGNED_OVERFLOW_SANITIZE
-"
-True
-when
-=
-ub_unsigned_overflow_san
-)
 #
 any_ubsan
 =