Streamlined cmake script, set USE_SYCL_FOR_COMPLEX_TYPES on all platforms

Author: oleksandr-pavlyk

dpctl/tensor/CMakeLists.txt

@@ -187,11 +187,8 @@ foreach(_src_fn ${_no_fast_math_sources})
      PROPERTIES COMPILE_OPTIONS "${_combined_options_prop}"
   )
 endforeach()
-if (UNIX)
-  set(_compiler_definitions "USE_SYCL_FOR_COMPLEX_TYPES")
-else()
-  set(_compiler_definitions "USE_SYCL_FOR_COMPLEX_TYPES")
-endif()
+
+set(_compiler_definitions "USE_SYCL_FOR_COMPLEX_TYPES")
 
 foreach(_src_fn ${_elementwise_sources})
   get_source_file_property(_cmpl_options_defs ${_src_fn} COMPILE_DEFINITIONS)