What is the purpose of the --language-server command line option?

[HighCommander4]

When vscode-cquery launches the cquery language server, it passes the command-line option--language-server.

Does this serve a purpose? The server seems to work fine without it, and I can't find any code in the server that handles it.

[jacobdufault]

This is from a while ago, when cquery required --language-server to act as a language server. Running cquery alone would print help. --language-server was made default and is no longer needed.