--- b/build/config/compiler/BUILD.gn
+++ a/build/config/compiler/BUILD.gn
@@ -1920,24 +1920,6 @@
   }
 }
 
-# Enable UBSan subset to ensure we always hit `return` statement in non-void
-# functions (https://crbug.com/489565636). This is equivalent to inserting
-# `NOTREACHED()` at the end of such functions.
-config("sanitize_return") {
-  if (!is_ubsan && is_clang) {
-    cflags = [
-      "-fsanitize=return",
-      "-fsanitize-trap=return",
-
-      # Some code users feature detection to determine if UBSAN (or any
-      # sanitizer) is enabled, they then do expensive debug like operations. We
-      # want to suppress this behaviour since we want to keep performance costs
-      # as low as possible while having these checks.
-      "-fsanitize-ignore-for-ubsan-feature=return",
-    ]
-  }
-}
-
 config("rustc_revision") {
   if (rustc_revision != "") {
     # Similar to the `clang_revision` config, this is here so that all `.rs`