Remove a bogus empty file #1644

Job	Run time
config	4s
fuzz smoke test	34s
win+VS build	0s
linux-musl (alpine)	6m 44s
linux32 (daald/ubuntu32:xenial)	7m 24s
pedantic (fedora)	1m 52s
documentation	3m 17s
linux-gcc-default (ubuntu-latest)	9m 45s
linux-asan-ubsan (ubuntu-latest)	28m 16s
linux-gcc (ubuntu-20.04)	7m 10s
linux-leaks (ubuntu-latest)	10m 31s
linux-sha256 (ubuntu-latest)	9m 57s
linux-TEST-vars (ubuntu-20.04)	7m 8s
osx-clang (macos-13)	6h 0m 14s
osx-gcc (macos-13)	26m 10s
sparse	5m 3s
static-analysis	3m 21s
win+VS test	0s
win build	6m 44s
win test (1)	6m 28s
win test (0)	4m 46s
win test (2)	4m 52s
win test (3)	6m 10s
win test (5)	5m 8s
win test (4)	7m 48s
win test (6)	6h 0m 10s
win test (7)	5m 20s
win test (8)	5m 6s
win test (9)	5m 22s
	15h 5m 24s

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