Remove constraints from GitHub in constraints.txt

In testing, it appears that unnamed constraints don't really have an effect on
what pip installs anyway, so they only seem to cause problems if included in
the constraints.txt file.

We retain dependencies from GitHub in requirements files passed to pip-compile,
as it can resolve dependencies of GitHub-based packages and use that to inform
the versions pinned.

Makefile

@@ -266,6 +266,9 @@ constraints.txt: $(REQUIREMENTS)
 	.dataflow-versions.txt \
 	$^ \
 	--output-file constraints.txt
+	# remove constraints from GitHub, since pip does not support unnamed
+	# constraints, despite the fact that pip-compile includes them:
+	sed -i '/git+https/d' constraints.txt
 	# remove extras in name: e.g. apache-beam[gcp] --> apache-beam
 	sed -i.bak  's/\[.*\]//g' constraints.txt
 	rm -f constraints.txt.bak .dataflow-versions.txt

constraints.txt

@@ -288,7 +288,6 @@ tf-estimator-nightly==2.8.0.dev2021122109
 threadpoolctl==3.1.0
 toml==0.10.1
 toolz==0.10.0
-git+https://github.com/NVIDIA/torch-harmonics.git@8826246cacf6c37b600cdd63fde210815ba238fd
 torch==1.12.1
 torchvision==0.13.1
 tornado==6.1