Remove useless code in PMMG_updateTag function #90

Job	Run time
parmmg-debug / ci (ubuntu-20.04, on, on, on, off)	19m 16s
parmmg-debug / ci (ubuntu-20.04, on, on, off, off)	17m 37s
parmmg-debug / ci (ubuntu-20.04, on, off, on, off)	19m 38s
parmmg-debug / ci (ubuntu-20.04, on, off, off, off)	17m 34s
parmmg-debug / ci (ubuntu-20.04, off, on, on, off)	19m 0s
parmmg-debug / ci (ubuntu-20.04, off, on, off, off)	17m 17s
parmmg-debug / ci (ubuntu-20.04, off, off, on, off)	20m 25s
parmmg-debug / ci (ubuntu-20.04, off, off, off, off)	18m 18s
parmmg-debug / ci (macos-12, on, on, on, off)	51m 23s
parmmg-debug / ci (macos-12, on, on, off, off)	21m 21s
parmmg-debug / ci (macos-12, on, off, on, off)	51m 8s
parmmg-debug / ci (macos-12, on, off, off, off)	24m 22s
parmmg-debug / ci (macos-12, off, on, on, off)	46m 19s
parmmg-debug / ci (macos-12, off, on, off, off)	25m 23s
parmmg-debug / ci (macos-12, off, off, on, off)	39m 18s
parmmg-debug / ci (macos-12, off, off, off, off)	28m 40s
parmmg-debug / ci (ubuntu-20.04, off, off, off, on)	28m 50s
parmmg-debug / ci (ubuntu-20.04, off, off, on, on)	29m 59s
parmmg-debug / ci (macos-12, off, off, off, on)	21m 6s
	8h 36m 54s

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