Remove where op workaround for ck (#1854)

Co-authored-by: kahmed10 <15948690+kahmed10@users.noreply.github.com>

src/onnx/parse_where.cpp

@@ -31,8 +31,6 @@ namespace migraphx {
 inline namespace MIGRAPHX_INLINE_NS {
 namespace onnx {
 
-MIGRAPHX_DECLARE_ENV_VAR(MIGRAPHX_ENABLE_CK)
-
 struct parse_where : op_parser<parse_where>
 {
     std::vector<op_desc> operators() const { return {{"Where"}}; }
@@ -59,13 +57,6 @@ struct parse_where : op_parser<parse_where>
                 compute_broadcasted_lens(args[0]->get_shape().lens(), args[1]->get_shape().lens());
             lens = compute_broadcasted_lens(lens, args[2]->get_shape().lens());
 
-            if(enabled(MIGRAPHX_ENABLE_CK{}))
-            {
-                // Convert condition tensor to int32 to work around CK not supporting bool type
-                args[0] = info.add_instruction(
-                    make_op("convert", {{"target_type", shape::int32_type}}), args[0]);
-            }
-
             if(args[0]->get_shape().lens() != lens)
             {
                 args[0] =