Remove redundant type annotation
Remove redundant type annotation

weswigham/TypeScript,SaschaNaz/TypeScript,SaschaNaz/TypeScript,microsoft/TypeScript,Microsoft/TypeScript,microsoft/TypeScript,microsoft/TypeScript,kpreisser/TypeScript,RyanCavanaugh/TypeScript,kpreisser/TypeScript,kitsonk/TypeScript,SaschaNaz/TypeScript,Microsoft/TypeScript,weswigham/TypeScript,RyanCavanaugh/TypeScript,weswigham/TypeScript,RyanCavanaugh/TypeScript,kpreisser/TypeScript,kitsonk/TypeScript,Microsoft/TypeScript,SaschaNaz/TypeScript,kitsonk/TypeScript