Remove superfluous compiler option

cmb69 · cmb69 · commit 4f0e5c8dd95e · 2019-12-31T12:00:10.000+01:00
`-fsanitize-address-use-after-scope` is the default as of clang 5.0.0,
and we don't allow to enable ASan for older versions anyway.
diff --git a/win32/build/confutils.js b/win32/build/confutils.js
@@ -3702,7 +3702,6 @@ function add_asan_opts(cflags_name, libs_name, ldflags_name)
 
 	if (!!cflags_name) {
 		ADD_FLAG(cflags_name, "-fsanitize=address");
-		ADD_FLAG(cflags_name, "-fsanitize-address-use-after-scope");
 	}
 	if (!!libs_name) {
 		if (X64) {

Original file line number	Diff line number	Diff line change
`@@ -3702,7 +3702,6 @@ function add_asan_opts(cflags_name, libs_name, ldflags_name)`
`3702`	`3702`
`3703`	`3703`	`if (!!cflags_name) {`
`3704`	`3704`	`ADD_FLAG(cflags_name, "-fsanitize=address");`
`3705`		`- ADD_FLAG(cflags_name, "-fsanitize-address-use-after-scope");`
`3706`	`3705`	`}`
`3707`	`3706`	`if (!!libs_name) {`
`3708`	`3707`	`if (X64) {`