Revert "Dispose logger on extension deactivation"

This reverts commit 2c88563.
That commit was wrong because we use-after-free the logger

Author: Veetaha

rust-analyzer/editors/code/src/main.ts

@@ -49,8 +49,6 @@ async function tryActivate(context: vscode.ExtensionContext) {
     );
     context.subscriptions.push(defaultOnEnter);
 
-    context.subscriptions.push(log);
-
     const config = new Config(context);
     const state = new PersistentState(context.globalState);
     const serverPath = await bootstrap(config, state).catch(err => {

rust-analyzer/editors/code/src/util.ts

@@ -18,10 +18,6 @@ export const log = new class {
     private enabled = true;
     private readonly output = vscode.window.createOutputChannel("Rust Analyzer Client");
 
-    dispose() {
-        log.output.dispose();
-    }
-
     setEnabled(yes: boolean): void {
         log.enabled = yes;
     }