[arm] Drop SMMLS support.

src/arm/assembler-arm.cc

Index: src/arm/assembler-arm.cc
diff --git a/src/arm/assembler-arm.cc b/src/arm/assembler-arm.cc
index 7e7456e78f90070cfe3fd52db5e9880f67fce342..45465119b35a6a7f945a2fb9c097596f5ac27ff9 100644
--- a/src/arm/assembler-arm.cc
+++ b/src/arm/assembler-arm.cc
@@ -1587,14 +1587,6 @@ void Assembler::smmla(Register dst, Register src1, Register src2, Register srcA,
 }
 
 
-void Assembler::smmls(Register dst, Register src1, Register src2, Register srcA,
-                      Condition cond) {
-  DCHECK(!dst.is(pc) && !src1.is(pc) && !src2.is(pc) && !srcA.is(pc));
-  emit(cond | B26 | B25 | B24 | B22 | B20 | dst.code() * B16 |
-       srcA.code() * B12 | src2.code() * B8 | B7 | B6 | B4 | src1.code());
-}
-
-
 void Assembler::smmul(Register dst, Register src1, Register src2,
                       Condition cond) {
   DCHECK(!dst.is(pc) && !src1.is(pc) && !src2.is(pc));