_get_ldg_nodes_from_loopy_insn: remove duplicate code #92

Job	Run time
Tests for downstream project Firedrake	16m 40s
Conda Examples	2m 18s
Documentation	2m 7s
Tests for downstream project arraycontext	2m 49s
Tests for downstream project meshmode	11m 6s
Flake8	26s
Mypy	1m 56s
Pylint	2m 15s
Tests for downstream project grudge	7m 39s
Tests for downstream project pytential	33m 39s
Conda Pytest (ubuntu-latest)	4m 25s
Conda Pytest with Intel CL	4m 19s
Tests for downstream project pytato	6m 9s
Conda Pytest without arg check	4m 29s
Conda Pytest (macos-latest)	4m 37s
Conda Pytest Twice (for cache behavior)	4m 24s
Conda Pytest with Barvinok	4m 23s
	1h 53m 41s

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