Bug 1030642: Remove two build warnings (unused variable kind and tautological assertion) on ARM; r=mjrosenb

js/src/jit/arm/Architecture-arm.h

@@ -335,7 +335,6 @@ class VFPRegister
     }
     static VFPRegister FromCode(uint32_t i) {
         uint32_t code = i & 31;
-        uint32_t kind = i >> 5;
         return VFPRegister(code, Double);
     }
     bool volatile_() const {

js/src/jit/arm/MacroAssembler-arm.cpp

@@ -3525,7 +3525,7 @@ void
 MacroAssemblerARMCompat::storePayload(Register src, const BaseIndex &dest)
 {
     unsigned shift = ScaleToShift(dest.scale);
-    MOZ_ASSERT(shift < 32 && shift >= 0);
+    MOZ_ASSERT(shift < 32);
     MOZ_ASSERT(dest.offset == 0);
 
     // If NUNBOX32_PAYLOAD_OFFSET is not zero, the memory operand [base + index << shift + imm]