Remove the hacky semaphore override for libhipcxx

[jamesETsmith]

🔨Work Item

There was a change to how libhipcxx last year that explicitly disallows use of semaphore (see my issue ROCm/libhipcxx#10). Since we want to work with the latest version of libhipcxx, we're forced to do some very hacky and brittle things when installing dependencies for graphbolt, see the discussion here: #16.

dgl/script/install_graphbolt_deps.sh

Lines 22 to 33 in 7da392a

	# TODO this is an unacceptable way to do this,
	# see https://github.com/ROCm/libhipcxx/issues/10 for more details
	# This was implicitly not allowed in previous releases we were using,
	# but with v2.7.0 they are explicitly not allowed.
	# We only use semaphores for a counter of IO operations in graphbolt,
	# that only runs on the host (not on the device) so we should be "safe"
	# to use this for now.
	sed -i '/#error semaphore is not supported on AMD hardware and should not be included/d' ${INSTALL_PREFIX}/include/rapids/libhipcxx/cuda/semaphore
	sed -i '/#error semaphore is not supported on AMD hardware and should not be included/d' ${INSTALL_PREFIX}/include/rapids/libhipcxx/hip/semaphore
	sed -i '/#error semaphore is not supported on AMD hardware and should not be included/d' ${INSTALL_PREFIX}/include/rapids/libhipcxx/cuda/std/semaphore
	sed -i '/#error semaphore is not supported on AMD hardware and should not be included/d' ${INSTALL_PREFIX}/include/rapids/libhipcxx/hip/std/semaphore

We'd like to get rid of this as soon as possible.