Make the language option for LSP linters optional

ale_linters/cpp/cquery.vim

@@ -30,5 +30,4 @@ call ale#linter#Define('cpp', {
 \   'command_callback': 'ale_linters#cpp#cquery#GetCommand',
 \   'project_root_callback': 'ale_linters#cpp#cquery#GetProjectRoot',
 \   'initialization_options_callback': 'ale_linters#cpp#cquery#GetInitializationOptions',
-\   'language': 'cpp',
 \})