remove changes from SYCL header pi.h

Author: vmaksimo

sycl/include/CL/sycl/detail/pi.h

@@ -673,8 +673,6 @@ static const uint8_t PI_DEVICE_BINARY_OFFLOAD_KIND_SYCL = 4;
 /// PropertySetRegistry::SYCL_SPECIALIZATION_CONSTANTS defined in
 /// PropertySetIO.h
 #define __SYCL_PI_PROPERTY_SET_SPEC_CONST_MAP "SYCL/specialization constants"
-#define __SYCL_PI_PROPERTY_SET_SPEC_CONST_DEFAULT_VALUES_MAP                   \
-  "SYCL/specialization constants default values"
 /// PropertySetRegistry::SYCL_DEVICELIB_REQ_MASK defined in PropertySetIO.h
 #define __SYCL_PI_PROPERTY_SET_DEVICELIB_REQ_MASK "SYCL/devicelib req mask"
 /// PropertySetRegistry::SYCL_KERNEL_PARAM_OPT_INFO defined in PropertySetIO.h