KF5_HAVE_GLIB etc. are apparently unused

...ever since their introduction with 4d78cf97
"Extend build system to support linking against KDE Frameworks 5"

Change-Id: I47f0b6c440aa345d564abac5a12a4af35b8fcf4e
Reviewed-on: https://gerrit.libreoffice.org/58476
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

config_host.mk.in

@@ -305,9 +305,6 @@ export KDE4_GLIB_LIBS=$(gb_SPACE)@KDE4_GLIB_LIBS@
 export KDE4_HAVE_GLIB=@KDE4_HAVE_GLIB@
 export KF5_CFLAGS=$(gb_SPACE)@KF5_CFLAGS@
 export KF5_LIBS=$(gb_SPACE)@KF5_LIBS@
-export KF5_GLIB_CFLAGS=$(gb_SPACE)@KF5_GLIB_CFLAGS@
-export KF5_GLIB_LIBS=$(gb_SPACE)@KF5_GLIB_LIBS@
-export KF5_HAVE_GLIB=@KF5_HAVE_GLIB@
 export KRB5_LIBS=@KRB5_LIBS@
 export LCMS2_CFLAGS=$(gb_SPACE)@LCMS2_CFLAGS@
 export LCMS2_LIBS=$(gb_SPACE)@LCMS2_LIBS@