Remove --skipPercent reference from README
Remove --skipPercent reference from README

Since the test runner feature is long gone
weswigham/TypeScript,microsoft/TypeScript,Microsoft/TypeScript,kpreisser/TypeScript,kpreisser/TypeScript,RyanCavanaugh/TypeScript,SaschaNaz/TypeScript,SaschaNaz/TypeScript,microsoft/TypeScript,Microsoft/TypeScript,weswigham/TypeScript,Microsoft/TypeScript,SaschaNaz/TypeScript,SaschaNaz/TypeScript,microsoft/TypeScript,kitsonk/TypeScript,weswigham/TypeScript,kitsonk/TypeScript,kpreisser/TypeScript,RyanCavanaugh/TypeScript,kitsonk/TypeScript,RyanCavanaugh/TypeScript