[arm64] Turn off the default NaN mode on arm64.

src/arm64/code-stubs-arm64.cc

Index: src/arm64/code-stubs-arm64.cc
diff --git a/src/arm64/code-stubs-arm64.cc b/src/arm64/code-stubs-arm64.cc
index 13438cfadeb37aa37ff9ecb7d987726a2cdd92fc..c9a9f5ffa3e4156385c4697f9ff99c480eaeea0f 100644
--- a/src/arm64/code-stubs-arm64.cc
+++ b/src/arm64/code-stubs-arm64.cc
@@ -1323,11 +1323,6 @@ void JSEntryStub::Generate(MacroAssembler* masm) {
   __ Mov(jssp, csp);
   __ SetStackPointer(jssp);
 
-  // Configure the FPCR. We don't restore it, so this is technically not allowed
-  // according to AAPCS64. However, we only set default-NaN mode and this will
-  // be harmless for most C code. Also, it works for ARM.
-  __ ConfigureFPCR();
-
   ProfileEntryHookStub::MaybeCallEntryHook(masm);
 
   // Set up the reserved register for 0.0.