fix: compilation warnings with `-Wunused-parameter` #208

Job	Run time
linux (tiny, clang, native)	1m 47s
macos (tiny, macos-12)	1m 6s
linux (tiny, gcc, native)	2m 5s
windows (HUGE, msvc, no, no, x64, stable)	6m 25s
macos (tiny, macos-14)	45s
macos (normal, macos-12)	6m 59s
macos (normal, macos-14)	4m 24s
macos (huge, macos-12)	14m 15s
macos (huge, macos-14)	13m 27s
windows (HUGE, mingw, yes, yes, x86, stable, yes)	10m 58s
windows (HUGE, msvc, no, yes, x86)	9m 20s
linux (normal, clang, native)	5m 15s
windows (HUGE, mingw, yes, no, x64, yes)	9m 34s
linux (normal, gcc, native)	5m 33s
windows (NORMAL, msvc, yes, no, x86)	6m 23s
linux (huge, clang, native)	8m 36s
windows (NORMAL, mingw, no, yes, x64)	9m 6s
linux (huge, gcc, native)	10m 43s
windows (TINY, msvc, yes, yes, x64)	2m 0s
linux (tiny, clang, nogui)	1m 37s
windows (TINY, mingw, no, no, x86)	2m 43s
linux (tiny, gcc, nogui)	1m 50s
linux (normal, gcc, i386, ./src/shadow)	6m 8s
linux (huge, gcc, uchar, testgui, true, dynamic)	9m 25s
linux (huge, clang, asan, 5.1)	18m 24s
linux (huge, gcc, unittests, true)	2m 36s
linux (normal, gcc, vimtags)	2m 15s
	2h 53m 39s

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