No need for an IWYU exception

...following up on deb8edf917 "Add IWYU exception"
and 414a91c9e0 "Fix Tinderbox Linux WASM following
'IWYU on desktop'" (and cf. 8bf0692331 "Fix
missing include for Emscripten build")

Change-Id: I4fc46e843f070b5746b2781375f0007ee0c9c0de
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/191044
Reviewed-by: Gabor Kelemen <gabor.kelemen.extern@allotropia.de>
Tested-by: Jenkins

desktop/IwyuFilter_desktop.yaml

@@ -20,8 +20,6 @@ excludelist:
     desktop/source/app/appinit.cxx:
     # Needed on IOS
     - rtl/bootstrap.hxx
-    # Needed for EMSCRIPTEN build
-    - initjsunoscripting.hxx
     desktop/source/app/cmdlineargs.cxx:
     # Don't propose hxx -> h change in URE libs
     - osl/thread.hxx

desktop/source/app/appinit.cxx

@@ -23,7 +23,6 @@
 
 #include <app.hxx>
 #include <dp_shared.hxx>
-#include <initjsunoscripting.hxx>
 #include "cmdlineargs.hxx"
 #include <strings.hrc>
 #include <com/sun/star/lang/XInitialization.hpp>
@@ -46,6 +45,10 @@
 #include <iostream>
 #include <map>
 
+#if defined EMSCRIPTEN
+#include <initjsunoscripting.hxx>
+#endif
+
 using namespace ::com::sun::star::uno;
 using namespace ::com::sun::star::lang;
 using namespace ::com::sun::star::ucb;