lint: remove shellcheck for zsh

init.lua

@@ -179,7 +179,7 @@ lint.linters.clippy = {
 	stdin = false,
 	append_fname = true,
 	args = {},
-	stream = nil, -- ('stdout' | 'stderr' | 'both') configure the stream to which the linter outputs the linting result.
+	stream = 'stdout',
 	ignore_exitcode = false,
 	env = nil,
 	parser = require('lint.parser').from_errorformat(clippy_format)
@@ -191,7 +191,6 @@ linters = {
 	python = {'flake8'},
 	rust = {'clippy'},
 	yaml = {'yamllint'},
-	zsh = {'shellcheck'},
 }
 -- set linters --
 lint.linters_by_ft = linters