[SYCL][NFC] Clean-up iostream_proxy.hpp uses. (#10479)

Author: bader

sycl/include/sycl/detail/device_filter.hpp

@@ -10,10 +10,10 @@
 
 #include <sycl/backend_types.hpp>
 #include <sycl/detail/defines.hpp>
-#include <sycl/detail/iostream_proxy.hpp>
 #include <sycl/info/info_desc.hpp>
 
 #include <optional>
+#include <ostream>
 #include <string>
 
 namespace sycl {

sycl/include/sycl/detail/image_accessor_util.hpp

@@ -15,7 +15,6 @@
 #include <sycl/builtins.hpp>
 #include <sycl/detail/export.hpp>
 #include <sycl/detail/generic_type_traits.hpp>
-#include <sycl/detail/iostream_proxy.hpp>
 #include <sycl/image.hpp>
 #include <sycl/sampler.hpp>
 #include <sycl/types.hpp>

sycl/include/sycl/exception_list.hpp

@@ -11,12 +11,12 @@
 // 4.9.2 Exception Class Interface
 
 #include <sycl/async_handler.hpp>
-#include <sycl/detail/defines.hpp>
+#include <sycl/detail/defines_elementary.hpp>
 #include <sycl/detail/export.hpp>
 #include <sycl/detail/iostream_proxy.hpp>
 
 #include <cstddef>
-#include <functional>
+#include <exception>
 #include <vector>
 
 namespace sycl {

sycl/source/detail/posix_pi.cpp

@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include <sycl/detail/defines.hpp>
+#include <sycl/detail/defines_elementary.hpp>
 #include <sycl/detail/iostream_proxy.hpp>
 #include <sycl/detail/pi.hpp>