fix(core): avoid duplicate contract type re-exports

Author: Shaw

packages/core/src/index.ts

@@ -12,9 +12,3 @@
 // Re-export everything from the Node.js entry point
 // This ensures that imports from "@elizaos/core" resolve correctly during builds
 export * from "./index.node";
-
-// Phase 5A transition shim: re-export type contracts from @elizaos/contracts so
-// consumers migrating off `@elizaos/core` keep working while imports are moved
-// over to the dedicated types-only package. Duplicate names from `./index.node`
-// take precedence; `export type *` silently excludes overlapping identifiers.
-export type * from "@elizaos/contracts";