Cleanup: remove zero-length files #430

Job	Run time
address_ub_sanitizer	58s
basic_clang	1m 19s
basic_gcc	1m 6s
check_docs	55s
check_update	1m 16s
check-c99	57s
enable_non-default_options	3m 51s
external-test-cf-quiche	1m 35s
external-test-pyca (1.51.0, 3.9)	1m 33s
external-tests	1m 23s
full_featured	1m 6s
fuzz_tests	56s
legacy	42s
memory_sanitizer	1m 31s
minimal	2m 27s
no-deprecated	1m 1s
no-legacy	59s
non-caching	59s
no-shared-macos (macos-13)	2m 40s
no-shared-ubuntu	1m 1s
no-shared-macos (macos-14)	54s
out-of-readonly-source-and-install-macos (macos-13)	1m 58s
out-of-readonly-source-and-install-ubuntu	59s
out-of-readonly-source-and-install-macos (macos-14)	1m 7s
self-hosted	0s
threads_sanitizer	1m 14s
	34m 27s

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