Remove unused MathUtils.orthogonalizeRotationMatrix() #3059

Job	Run time
Build Examples	5m 16s
photonclient-check-lint	28s
photon-build-all	4m 27s
photonclient-build	1m 23s
Photonlib - Build Docker - Athena	9m 23s
Photonlib - Build Host - Win64	9m 45s
photonserver-build-offline-docs	1m 40s
Photonlib - Build Docker - Raspbian	11m 43s
wpiformat	23s
Photonlib - Build Host - Linux	4m 55s
Photonlib - Build Docker - Aarch64	11m 33s
photonserver-check-lint	1m 7s
Build fat JAR - Win64	3m 51s
Build fat JAR - macOS	2m 20s
Build fat JAR - Linux	2m 28s
Build fat JAR - macOSArm	3m 1s
Build fat JAR - LinuxArm32	1m 44s
Build fat JAR - LinuxArm64	2m 11s
Build image - ${{ matrix.image_url }}	0s
photon-release	0s
	1h 17m 38s

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