vcl PDFiumLibraryTest: clean up not needed HAVE_FEATURE_PDFIUM ifdefs

This was already conditional in Module_vcl, so no need to have a
duplicated check here.

Which allows finally removing the HAVE_FEATURE_PDFIUM ifdef completely.

New code can just call vcl::pdf::PDFiumLibrary::get() at runtime and see
if the result is nullptr or not.

Change-Id: I36508181865a31618e48cf7c2680d75465130dd3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/114108
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

config_host/config_features.h.in

@@ -131,11 +131,6 @@
  */
 #define HAVE_FEATURE_NSS 0
 
-/*
- * Whether pdfium is available
- */
-#define HAVE_FEATURE_PDFIUM 0
-
 /*
  * Whether poppler is available
  */

configure.ac

@@ -11627,7 +11627,6 @@ ENABLE_PDFIUM=
 if test \( -z "$enable_pdfium" -a "$ENABLE_PDFIMPORT" = "TRUE" \) -o "$enable_pdfium" = yes; then
     AC_MSG_RESULT([yes])
     ENABLE_PDFIUM=TRUE
-    AC_DEFINE(HAVE_FEATURE_PDFIUM)
     BUILD_TYPE="$BUILD_TYPE PDFIUM"
 else
     AC_MSG_RESULT([no])

vcl/qa/cppunit/PDFiumLibraryTest.cxx

@@ -7,10 +7,6 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-#include <config_features.h>
-
-#if HAVE_FEATURE_PDFIUM
-
 #include <string_view>
 
 #include <cppunit/TestAssert.h>
@@ -406,6 +402,4 @@ CPPUNIT_TEST_SUITE_REGISTRATION(PDFiumLibraryTest);
 
 CPPUNIT_PLUGIN_IMPLEMENT();
 
-#endif
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */