Clean up unused logging infrastructure (#234)

* Remove unused AsyncLocalStorage infrastructure

The AsyncLocalStorage infrastructure (loggerStorage, getLogger,
runWithLogger) was set up but never actually used. The codebase uses
explicit logger passing via constructor injection throughout.

This change removes the unused code, simplifies the logging module,
and documents the explicit passing pattern as the canonical approach.
The pattern works well for all scenarios including request context,
background operations, lifecycle events, and long-lived objects.

No breaking changes as the removed functions were never called.

* Add changeset for logging cleanup

* Fix e2e test worker template configuration

Use 'vars' instead of 'env' for environment variables in wrangler template.

Author: ghostwriternr

.changeset/cleanup-unused-logging.md

@@ -0,0 +1,5 @@
+---
+'@cloudflare/sandbox': patch
+---
+
+Remove unused logging infrastructure (getLogger, runWithLogger) that was never called

CLAUDE.md

@@ -331,9 +331,22 @@ shared package for consistency across the SDK.
 
 ### Logging
 
-- Centralized logger from `@repo/shared`
-- Structured logging with component context
-- Configurable via `SANDBOX_LOG_LEVEL` and `SANDBOX_LOG_FORMAT` env vars
+**Pattern**: Explicit logger passing via constructor injection throughout the codebase.
+
+```typescript
+class MyService {
+  constructor(private logger: Logger) {}
+
+  async doWork() {
+    const childLogger = this.logger.child({ operation: 'work' });
+    childLogger.info('Working', { context });
+  }
+}
+```
+
+**Configuration**: `SANDBOX_LOG_LEVEL` (debug|info|warn|error) and `SANDBOX_LOG_FORMAT` (json|pretty) env vars, read at startup.
+
+**Testing**: Use `createNoOpLogger()` from `@repo/shared` in tests.
 
 ### Session Management
 

package-lock.json

@@ -1,20 +1,3 @@
-/**
- * Log level for the sandbox container.
- *
- * Default: info
- * Environment variable: SANDBOX_LOG_LEVEL
- */
-const SANDBOX_LOG_LEVEL = process.env.SANDBOX_LOG_LEVEL || 'info';
-
-/**
- * Log format for the sandbox container.
- *
- * Default: json
- * Set to "pretty" to enable colored, human-readable output.
- * Environment variable: SANDBOX_LOG_FORMAT
- */
-const SANDBOX_LOG_FORMAT = process.env.SANDBOX_LOG_FORMAT || 'json';
-
 /**
  * How long to wait for an interpreter process to spawn and become ready.
  * If an interpreter doesn't start within this time, something is fundamentally
@@ -82,8 +65,6 @@ const STREAM_CHUNK_DELAY_MS = 100;
 const DEFAULT_CWD = '/workspace';
 
 export const CONFIG = {
-  SANDBOX_LOG_LEVEL,
-  SANDBOX_LOG_FORMAT,
   INTERPRETER_SPAWN_TIMEOUT_MS,
   INTERPRETER_EXECUTION_TIMEOUT_MS,
   COMMAND_TIMEOUT_MS,