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/test/http/router_test.cpp b/test/http/router_test.cpp
index e0e5b7a..5430872 100644
--- a/test/http/router_test.cpp
+++ b/test/http/router_test.cpp
@@ -1,9 +1,8 @@
-#include "async_resp.hpp" // IWYU pragma: keep
+#include "async_resp.hpp"
 #include "http_request.hpp"
 #include "routing.hpp"
 #include "utility.hpp"
 
-#include <boost/beast/http/message.hpp> // IWYU pragma: keep
 #include <boost/beast/http/verb.hpp>
 
 #include <memory>
@@ -11,13 +10,8 @@
 #include <string_view>
 #include <system_error>
 
-#include <gtest/gtest.h> // IWYU pragma: keep
+#include <gtest/gtest.h>
 
-// IWYU pragma: no_include <boost/beast/http/impl/message.hpp>
-// IWYU pragma: no_include "gtest/gtest_pred_impl.h"
-// IWYU pragma: no_include <boost/intrusive/detail/list_iterator.hpp>
-// IWYU pragma: no_include <gtest/gtest-message.h>
-// IWYU pragma: no_include <gtest/gtest-test-part.h>
 // IWYU pragma: no_forward_declare bmcweb::AsyncResp
 
 namespace crow