revert unnecessary changes

Author: ChaiBapchya

src/operator/mxnet_op.h

@@ -499,7 +499,7 @@ MSHADOW_XINLINE Shape<ndim> unravel(const index_t idx, const Shape<ndim>& shape)
   Shape<ndim> ret;
   #pragma unroll
   for (index_t i = ndim-1, j = idx; i >=0; --i) {
-    index_t tmp = j / shape[i];
+    auto tmp = j / shape[i];
     ret[i] = j - tmp*shape[i];
     j = tmp;
   }

src/operator/sequence_last.cc

@@ -31,9 +31,9 @@ template <>
 Operator *CreateOp<cpu>(SequenceLastParam param, int dtype, int itype) {
   Operator *op = nullptr;
   MSHADOW_TYPE_SWITCH(dtype, DType, {
-     MSHADOW_TYPE_SWITCH(itype, IType, {
+      MSHADOW_TYPE_SWITCH(itype, IType, {
           op = new SequenceLastOp<cpu, DType, IType>(param);
-       });
+        });
     });
   return op;
 }