Merge pull request 0xPolygon#325 from 0xPolygon/fix/hide-stb

Remove StB until legal approves it

Author: kmurphypolygon

docs/cdk/architecture/staking-the-bridge.md

@@ -89,7 +89,6 @@ nav:
       - Architecture:
         - CDK rollup: cdk/architecture/cdk-zkevm.md
         - CDK validium: cdk/architecture/cdk-validium.md
-        - Unified bridge - STB: cdk/architecture/staking-the-bridge.md
       - Specification:
         - Validium vs rollup: cdk/spec/validium-vs-rollup.md
       - Glossary: