drop gpgme for oss-fuzz

Change-Id: I0ed32f520cf5592ddaf95a849aed16a125b52656
Reviewed-on: https://gerrit.libreoffice.org/59761
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

configure.ac

@@ -10423,6 +10423,9 @@ if test "$build_for_ios" = "YES"; then
 elif test "$enable_mpl_subset" = "yes"; then
     AC_MSG_CHECKING([whether gpgmepp should be disabled due to building just MPL])
     AC_MSG_RESULT([yes])
+elif test "$enable_fuzzers" = "yes"; then
+    AC_MSG_CHECKING([whether gpgmepp should be disabled due to oss-fuzz])
+    AC_MSG_RESULT([yes])
 elif test "$_os" = "Linux" -o "$_os" = "Darwin" -o "$_os" = "WINNT" ; then
     dnl ===================================================================
     dnl Check for system gpgme