Remove apparently unused external/libgpg-error/disable-rpath-option.patch

...which only patched configure.ac not configure, and the latter does not appear
to be regenerated from the former in ExternalProject_libgpg-error

Change-Id: Id0132ed8fd8ea3a5012e4a2bc309bd5f3983ad11
Reviewed-on: https://gerrit.libreoffice.org/50954Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

external/libgpg-error/UnpackedTarball_libgpg-error.mk

@@ -14,7 +14,6 @@ $(eval $(call gb_UnpackedTarball_set_tarball,libgpg-error,$(LIBGPGERROR_TARBALL)
 $(eval $(call gb_UnpackedTarball_set_patchlevel,libgpg-error,0))
 
 $(eval $(call gb_UnpackedTarball_add_patches,libgpg-error, \
-    external/libgpg-error/disable-rpath-option.patch \
 	$(if $(filter MSC,$(COM)),external/libgpg-error/w32-build-fixes.patch) \
 	$(if $(filter MSC,$(COM)),external/libgpg-error/w32-build-fixes-2.patch.1) \
 	$(if $(filter MSC,$(COM)),external/libgpg-error/w32-build-fixes-3.patch.1) \

external/libgpg-error/disable-rpath-option.patch

-diff -ur libgpg-error.org/configure.ac libgpg-error/configure.ac
---- configure.ac	2017-03-05 01:27:38.249210887 +0100
-+++ configure.ac~	2017-03-05 01:29:36.820894687 +0100
-@@ -404,6 +404,9 @@
-    CFLAGS="$CFLAGS -fvisibility=hidden"
- fi
- 
-+# permit disabling rpath
-+AC_LIB_RPATH
-+
- #
- # Check whether ld supports a version script.
- # (Actually not a check but a list of systems which are known to support it.)