meson: Remove tag generation

This is insanely fruststating. Since it works off of currently committed
git files, if you ever remove anything, your build will fail until you
commit it.

It doesn't even belong in the build system anyway, as it's only part of
an individual's specific workflow. Use for own scripts for your own
workflow. Go use some git hooks to generate this or something.

meson.build

@@ -194,36 +194,3 @@ pkgconfig.generate(lib_wlr,
 	name: meson.project_name(),
 	description: 'Wayland compositor library',
 )
-
-git = find_program('git', required: false)
-if git.found()
-	all_files = run_command(
-		git,
-		'--git-dir=@0@/.git'.format(meson.current_source_dir()),
-		'ls-files',
-		':/*.[ch]',
-	)
-	all_files = files(all_files.stdout().split())
-
-	etags = find_program('etags', required: false)
-	if etags.found() and all_files.length() > 0
-		custom_target(
-			'etags',
-			build_by_default: true,
-			input: all_files,
-			output: 'TAGS',
-			command: [etags, '-o', '@OUTPUT@', '@INPUT@'],
-		)
-	endif
-
-	ctags = find_program('ctags', required: false)
-	if ctags.found() and all_files.length() > 0
-		custom_target(
-			'ctags',
-			build_by_default: true,
-			input: all_files,
-			output: 'tags',
-			command: [ctags, '-f', '@OUTPUT@', '@INPUT@'],
-		)
-	endif
-endif