Remove IWYU pragmas

These were added as part of
d5c80ad9c07b94465d8ea62d2b6f87c30cac765e: test treewide: iwyu

Since then, Nan hasn't been very active on the project, and to my
knowledge, since the initial run, we've never used IWYU again.

clang-include-cleaner seems to work well without needing these pragmas,
and is what we're using, even if it's less useful than IWYU.

Remove all mention of IWYU.

Tested: Code compiles.

Change-Id: I06feedeeac9a114f5bdec81d59ca83223efd8aa7
Signed-off-by: Ed Tanous <etanous@nvidia.com>
diff --git a/include/dbus_utility.hpp b/include/dbus_utility.hpp
index c9604f0..11163de 100644
--- a/include/dbus_utility.hpp
+++ b/include/dbus_utility.hpp
@@ -19,7 +19,7 @@
 #include "dbus_singleton.hpp"
 #include "logging.hpp"
 
-#include <boost/system/error_code.hpp> // IWYU pragma: keep
+#include <boost/system/error_code.hpp>
 #include <sdbusplus/asio/property.hpp>
 #include <sdbusplus/message/native_types.hpp>
 
@@ -38,10 +38,6 @@
 #include <variant>
 #include <vector>
 
-// IWYU pragma: no_include <stddef.h>
-// IWYU pragma: no_include <stdint.h>
-// IWYU pragma: no_include <boost/system/detail/error_code.hpp>
-
 namespace dbus
 {
 
diff --git a/include/http_utility.hpp b/include/http_utility.hpp
index c6c0e3e..3eef889 100644
--- a/include/http_utility.hpp
+++ b/include/http_utility.hpp
@@ -10,8 +10,6 @@
 #include <string_view>
 #include <vector>
 
-// IWYU pragma: no_include <ctype.h>
-
 namespace http_helpers
 {
 
diff --git a/include/openbmc_dbus_rest.hpp b/include/openbmc_dbus_rest.hpp
index 9a3a632..4671793 100644
--- a/include/openbmc_dbus_rest.hpp
+++ b/include/openbmc_dbus_rest.hpp
@@ -64,15 +64,6 @@
 #include <variant>
 #include <vector>
 
-// IWYU pragma: no_include <boost/algorithm/string/detail/classification.hpp>
-// IWYU pragma: no_include <boost/system/detail/error_code.hpp>
-// IWYU pragma: no_include <boost/system/detail/error_category.hpp>
-// IWYU pragma: no_include <errno.h>
-// IWYU pragma: no_include <string.h>
-// IWYU pragma: no_include <ext/alloc_traits.h>
-// IWYU pragma: no_include <exception>
-// IWYU pragma: no_include <boost/type_index/type_index_facade.hpp>
-
 namespace crow
 {
 namespace openbmc_mapper