chore: remove deprecated createLogger alias from @bete/shared/logger

Zero usages found across the codebase. Safe to delete.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packages/shared/src/logger/index.ts

@@ -29,11 +29,3 @@ export type CustomLogger = Logger;
 export function createChildLogger(context: string) {
   return rootLogger.child({ context });
 }
-
-/**
- * Alias for createChildLogger for backwards compatibility.
- * @deprecated Use createChildLogger instead.
- */
-export function createLogger(context: string) {
-  return createChildLogger(context);
-}