Everywhere: Remove unused ArgsParser header

Found while trying to enumerate all programs that use ArgsParser.

Userland/DevTools/HackStudio/HackStudioWidget.cpp

@@ -27,7 +27,6 @@
 #include <AK/StringBuilder.h>
 #include <Kernel/API/InodeWatcherEvent.h>
 #include <LibConfig/Client.h>
-#include <LibCore/ArgsParser.h>
 #include <LibCore/Event.h>
 #include <LibCore/EventLoop.h>
 #include <LibCore/File.h>

Userland/Libraries/LibTest/JavaScriptTestRunner.h

@@ -16,7 +16,6 @@
 #include <AK/QuickSort.h>
 #include <AK/Result.h>
 #include <AK/Tuple.h>
-#include <LibCore/ArgsParser.h>
 #include <LibCore/DirIterator.h>
 #include <LibCore/File.h>
 #include <LibJS/Bytecode/Interpreter.h>

Userland/Libraries/LibTest/JavaScriptTestRunnerMain.cpp

@@ -6,6 +6,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <LibCore/ArgsParser.h>
 #include <LibTest/JavaScriptTestRunner.h>
 #include <signal.h>
 #include <stdio.h>

Userland/Libraries/LibWeb/DumpLayoutTree/main.cpp

@@ -4,7 +4,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include <LibCore/ArgsParser.h>
 #include <LibGUI/Application.h>
 #include <LibGUI/Window.h>
 #include <LibWeb/OutOfProcessWebView.h>

Userland/Shell/Shell.cpp

@@ -18,7 +18,6 @@
 #include <AK/StringBuilder.h>
 #include <AK/TemporaryChange.h>
 #include <AK/URL.h>
-#include <LibCore/ArgsParser.h>
 #include <LibCore/DirIterator.h>
 #include <LibCore/Event.h>
 #include <LibCore/EventLoop.h>