Remove usage of Styles type

Summary: This type was often used when (View|Text|Image)StyleProp should have been used instead. Since there were no valid usages of it in our codebase, we are not making it public anymore.

Reviewed By: yungsters

Differential Revision: D7188658

fbshipit-source-id: 7112cc4a7da7b007b5c758a0890d2e0b8fe1797a

Author: elicwhite

Libraries/StyleSheet/StyleSheet.js

@@ -18,7 +18,7 @@ const flatten = require('flattenStyle');
 
 import type {
   ____StyleSheetInternalStyleIdentifier_Internal as StyleSheetInternalStyleIdentifier,
-  Styles as _Styles,
+  ____Styles_Internal,
   ____StyleObj_Internal,
   ____ViewStyleProp_Internal,
   ____TextStyleProp_Internal,
@@ -31,8 +31,6 @@ export type ViewStyleProp = ____ViewStyleProp_Internal;
 export type TextStyleProp = ____TextStyleProp_Internal;
 export type ImageStyleProp = ____ImageStyleProp_Internal;
 
-export type Styles = _Styles;
-
 let hairlineWidth = PixelRatio.roundToNearestPixel(0.4);
 if (hairlineWidth === 0) {
   hairlineWidth = 1 / PixelRatio.get();
@@ -221,7 +219,7 @@ module.exports = {
   /**
    * Creates a StyleSheet style reference from the given object.
    */
-  create<+S: Styles>(obj: S): $ObjMap<S, (Object) => StyleSheetInternalStyleIdentifier> {
+  create<+S: ____Styles_Internal>(obj: S): $ObjMap<S, (Object) => StyleSheetInternalStyleIdentifier> {
     const result = {};
     for (const key in obj) {
       StyleSheetValidation.validateStyle(key, obj);

Libraries/StyleSheet/StyleSheetTypes.js

@@ -241,7 +241,7 @@ export type ____ImageStyleProp_Internal = GenericStyleProp<
   $ReadOnly<$Shape<ImageStyle>>,
 >;
 
-export type Styles = {
+export type ____Styles_Internal = {
   +[key: string]: $Shape<Style>,
 };