Sunset the value namespace (#1720)

Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1720

X-link: https://github.com/facebook/react-native/pull/46930

This is not really needed anymore, we can just use `StyleLength` statics instead

Changelog: [Internal]

Reviewed By: NickGerleman

Differential Revision: D63922280

fbshipit-source-id: cd953bae8e9f68574463eafc49c33c2e85ac1856

yoga/style/StyleLength.h

@@ -104,36 +104,4 @@ inline bool inexactEquals(const StyleLength& a, const StyleLength& b) {
   return a.unit() == b.unit() && inexactEquals(a.value(), b.value());
 }
 
-namespace value {
-
-/**
- * Canonical unit (one YGUnitPoint)
- */
-constexpr StyleLength points(float value) {
-  return StyleLength::points(value);
-}
-
-/**
- * Percent of reference
- */
-constexpr StyleLength percent(float value) {
-  return StyleLength::percent(value);
-}
-
-/**
- * "auto" keyword
- */
-constexpr StyleLength ofAuto() {
-  return StyleLength::ofAuto();
-}
-
-/**
- * Undefined
- */
-constexpr StyleLength undefined() {
-  return StyleLength::undefined();
-}
-
-} // namespace value
-
 } // namespace facebook::yoga