Remove duplicate table entry from docs. #82

Job	Run time
ubuntu-latest/os/7.0/gcc/static	57s
ubuntu-latest/os/3.15/gcc/static	43s
ubuntu-latest/os/7.0/gcc/default	2m 18s
ubuntu-latest/os/3.15/gcc/default	42s
windows-2019/adsupport/7.0/vs2019/static	14m 8s
ubuntu-latest/adsupport/7.0/gcc/static	11s
ubuntu-20.04/os/7.0/gcc/default	6m 51s
	25m 50s

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