Minor refactor of injectStyled

Author: lttb

src/injectStyled.js

@@ -6,13 +6,10 @@ import type {StyledType} from './types'
 const injectStyled = (styled: StyledType) => (InnerComponent: ReactClass<any>) => {
   const sheet = styled.mountSheet()
 
-  const classNames = Object.keys(sheet.classes)
-
-  const classes = [...classNames]
-    .reduce((acc, name) => ({
-      ...acc,
-      [name]: composeClasses([sheet.classes[name]]),
-    }), {})
+  const classes = Object.keys(sheet.classes).reduce((acc, name) => ({
+    ...acc,
+    [name]: composeClasses([sheet.classes[name]]),
+  }), {})
 
   return (props: Object) => createElement(InnerComponent, {classes, ...props})
 }