chore: remove unused currentExtensionIsNightly() in config.ts

editors/code/src/config.ts

@@ -5,8 +5,6 @@ import { log } from "./util";
 
 export type UpdatesChannel = "stable" | "nightly";
 
-const NIGHTLY_TAG = "nightly";
-
 export type RunnableEnvCfg =
     | undefined
     | Record<string, string>
@@ -175,10 +173,6 @@ export class Config {
             gotoTypeDef: this.get<boolean>("hover.actions.gotoTypeDef.enable"),
         };
     }
-
-    get currentExtensionIsNightly() {
-        return this.package.releaseTag === NIGHTLY_TAG;
-    }
 }
 
 export async function updateConfig(config: vscode.WorkspaceConfiguration) {