Remove patch that has been merged upstream

[scpeters]

Patch merged in gazebosim/gz-transport#237

Buster build fails due to this patch no longer applying

https://build.osrfoundation.org/job/ign-transport10-debbuilder/281/

patching file include/ignition/transport/Helpers.hh
Reversed (or previously applied) patch detected!  Skipping patch.
1 out of 1 hunk ignored
dpkg-source: info: the patch has fuzz which is not allowed, or is malformed
dpkg-source: info: if patch '0001_zmq_430_strict.patch' is correctly applied by quilt, use 'quilt refresh' to update it
dpkg-source: error: LC_ALL=C patch -t -F 0 -N -p1 -u -V never -E -b -B .pc/0001_zmq_430_strict.patch/ --reject-file=- < ignition-transport-10.1.0.orig.2FPte2/debian/patches/0001_zmq_430_strict.patch subprocess returned exit status 1
dpkg-buildpackage: error: dpkg-source --include-binaries -b . subprocess returned exit status 2
debuild: fatal error at line 1182:
dpkg-buildpackage -us -uc -ui -S --source-option=--include-binaries failed
Build step 'Execute shell' marked build as failure

[scpeters]

trying:

https://build.osrfoundation.org/job/ign-transport10-debbuilder/285/