Revert "Enable WebAssembly trap handlers for AArch64"

This reverts commit 520c335469de0d01b2666a4c4ae321fd12b63423.

Reason for revert:
LUCI Bisection has identified this change as the culprit of a build failure. See the analysis: https://ci.chromium.org/ui/p/chromium/bisection/compile-analysis/b/8764439140677950945

Sample failed build: https://ci.chromium.org/b/8764439140677950945

If this is a false positive, please report it at https://bugs.chromium.org/p/chromium/issues/entry?comment=Analysis%3A+https%3A%2F%2Fci.chromium.org%2Fui%2Fp%2Fchromium%2Fbisection%2Fcompile-analysis%2Fb%2F8764439140677950945&components=Tools%3ETest%3EFindit&labels=LUCI-Bisection-Wrong%2CPri-3%2CType-Bug&status=Available&summary=Wrongly+blamed+https%3A%2F%2Fchromium-review.googlesource.com%2Fc%2Fchromium%2Fsrc%2F%2B%2F5028657

Original change's description:
> Enable WebAssembly trap handlers for AArch64
>
> The use of trap handlers for WebAssembly OOB accesses have been
> enabled in V8 for a while. The chromium tests had already been
> updated to handle the change when testing a simulator build, and this
> patch finally flips the switch to enable the feature.
>
> Cq-Include-Trybots: luci.chromium.try:linux_chromium_msan_rel_ng
> Change-Id: Ife085d435ca28b100e9b16e4e985447c90aa9faa
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5028657
> Commit-Queue: Andre Kempe <andre.kempe@arm.com>
> Reviewed-by: Kentaro Hara <haraken@chromium.org>
> Reviewed-by: danakj <danakj@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1224295}
>

Change-Id: Iae5e97792cd1662d52ea5113cfe86383e1beb282
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5027490
Bot-Commit: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Commit-Queue: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Owners-Override: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1224304}
diff --git a/content/renderer/render_process_impl.cc b/content/renderer/render_process_impl.cc
index e91dd2ac..be1f39d 100644
--- a/content/renderer/render_process_impl.cc
+++ b/content/renderer/render_process_impl.cc
@@ -224,8 +224,7 @@
     v8::V8::SetFlagsFromString(kSABPerContextFlag, sizeof(kSABPerContextFlag));
   }
 
-#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && \
-    (defined(ARCH_CPU_X86_64) || defined(ARCH_CPU_ARM64))
+#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && defined(ARCH_CPU_X86_64)
   if (base::FeatureList::IsEnabled(features::kWebAssemblyTrapHandler)) {
     base::CommandLine* const command_line =
         base::CommandLine::ForCurrentProcess();