LibWeb: Stop trying to guess include paths in IDL codegen

It turns out we were already generating all the necessary include
statements, and we can simply remove all this goofy code soup that
uses the C preprocessor to speculatively look for include files.

Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp

@@ -274,11 +274,8 @@ static void generate_include_for_iterator(auto& generator, auto& iterator_path)
 {
     auto iterator_generator = generator.fork();
     iterator_generator.set("iterator_class.path", iterator_path);
-    // FIXME: These may or may not exist, because REASONS.
     iterator_generator.append(R"~~~(
-//#if __has_include(<LibWeb/@iterator_class.path@.h>)
 #   include <LibWeb/@iterator_class.path@.h>
-//#endif
 )~~~");
 }
 
@@ -4361,47 +4358,6 @@ void generate_constructor_implementation(IDL::Interface const& interface, String
 #include <LibWeb/Bindings/@prototype_class@.h>
 #include <LibWeb/Bindings/ExceptionOrUtils.h>
 #include <LibWeb/Bindings/Intrinsics.h>
-#if __has_include(<LibWeb/Animations/@name@.h>)
-#    include <LibWeb/Animations/@name@.h>
-#elif __has_include(<LibWeb/Crypto/@name@.h>)
-#    include <LibWeb/Crypto/@name@.h>
-#elif __has_include(<LibWeb/CSS/@name@.h>)
-#    include <LibWeb/CSS/@name@.h>
-#elif __has_include(<LibWeb/DOM/@name@.h>)
-#    include <LibWeb/DOM/@name@.h>
-#elif __has_include(<LibWeb/Encoding/@name@.h>)
-#    include <LibWeb/Encoding/@name@.h>
-#elif __has_include(<LibWeb/Fetch/@name@.h>)
-#    include <LibWeb/Fetch/@name@.h>
-#elif __has_include(<LibWeb/FileAPI/@name@.h>)
-#    include <LibWeb/FileAPI/@name@.h>
-#elif __has_include(<LibWeb/Geometry/@name@.h>)
-#    include <LibWeb/Geometry/@name@.h>
-#elif __has_include(<LibWeb/HTML/@name@.h>)
-#    include <LibWeb/HTML/@name@.h>
-#elif __has_include(<LibWeb/UIEvents/@name@.h>)
-#    include <LibWeb/UIEvents/@name@.h>
-#elif __has_include(<LibWeb/HighResolutionTime/@name@.h>)
-#    include <LibWeb/HighResolutionTime/@name@.h>
-#elif __has_include(<LibWeb/IntersectionObserver/@name@.h>)
-#    include <LibWeb/IntersectionObserver/@name@.h>
-#elif __has_include(<LibWeb/NavigationTiming/@name@.h>)
-#    include <LibWeb/NavigationTiming/@name@.h>
-#elif __has_include(<LibWeb/RequestIdleCallback/@name@.h>)
-#    include <LibWeb/RequestIdleCallback/@name@.h>
-#elif __has_include(<LibWeb/ResizeObserver/@name@.h>)
-#    include <LibWeb/ResizeObserver/@name@.h>
-#elif __has_include(<LibWeb/SVG/@name@.h>)
-#    include <LibWeb/SVG/@name@.h>
-#elif __has_include(<LibWeb/Selection/@name@.h>)
-#    include <LibWeb/Selection/@name@.h>
-#elif __has_include(<LibWeb/WebSockets/@name@.h>)
-#    include <LibWeb/WebSockets/@name@.h>
-#elif __has_include(<LibWeb/XHR/@name@.h>)
-#    include <LibWeb/XHR/@name@.h>
-#elif __has_include(<LibWeb/DOMURL/@name@.h>)
-#    include <LibWeb/DOMURL/@name@.h>
-#endif
 #include <LibWeb/HTML/WindowProxy.h>
 #include <LibWeb/WebIDL/AbstractOperations.h>
 #include <LibWeb/WebIDL/Buffers.h>
@@ -4796,10 +4752,6 @@ void generate_iterator_prototype_implementation(IDL::Interface const& interface,
 #include <LibWeb/Bindings/ExceptionOrUtils.h>
 #include <LibWeb/Bindings/Intrinsics.h>
 #include <LibWeb/WebIDL/Tracing.h>
-
-#if __has_include(<LibWeb/@possible_include_path@.h>)
-#    include <LibWeb/@possible_include_path@.h>
-#endif
 )~~~");
 
     emit_includes_for_all_imports(interface, generator, true);