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/utility_test.cpp b/test/http/utility_test.cpp
index f5ae5b1..36725ef 100644
--- a/test/http/utility_test.cpp
+++ b/test/http/utility_test.cpp
@@ -12,10 +12,7 @@
 #include <string>
 #include <string_view>
 
-#include <gtest/gtest.h> // IWYU pragma: keep
-// IWYU pragma: no_include <gtest/gtest-message.h>
-// IWYU pragma: no_include <gtest/gtest-test-part.h>
-// IWYU pragma: no_include "gtest/gtest_pred_impl.h"
+#include <gtest/gtest.h>
 
 namespace crow::utility
 {