fs: remove broken symlinks in rmSync #1787

Job	Run time
Build slim tarball	1m 40s
aarch64-linux: with shared libraries	2h 25m 14s
aarch64-darwin: with shared libraries	2h 57m 18s
x86_64-linux: with shared libraries	2h 29m 27s
x86_64-darwin: with shared libraries	2h 27m 51s
	10h 21m 30s

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