Removed submodule unit_tests/pfunit #534

Job	Run time
build-all-debug	6m 47s
build-drivers-release	5m 16s
build-all-debug-single	3m 26s
build-postlib-release	10m 34s
build-test-uadriver-debug	2m 6s
rtest-module-drivers	1m 34s
rtest-modules-debug	10m 5s
build-openfast-release	4m 12s
build-interfaces-release	4m 7s
build-fastfarm-release	11m 48s
rtest-interfaces	3m 27s
rtest-OF-5MW_Land_AeroMap	1m 38s
rtest-OF	13m 16s
rtest-OF-5MW_Land_BD_DLL_WTurb	2m 24s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	5m 4s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	2m 4s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	2m 13s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	1m 40s
rtest-OF-simulink	11m 29s
rtest-OF-linearization	4m 27s
rtest-FF	2m 5s
	1h 49m 42s

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