Remove empty if statement (RUF072) #2023

Job	Run time
Pytest Conda Py3 POCL	3m 0s
Ruff	8s
Tests for downstream project mirgecom_examples	6s
Typos	7s
Pytest Conda Py3 Intel	2m 30s
Tests for downstream project grudge	12m 29s
basedpyright	2m 10s
Tests for downstream project mirgecom	4s
Tests for downstream project meshmode	11m 40s
Examples Conda Py3	1m 42s
Documentation	2m 17s
	36m 13s

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