Remove support for Android API < 23 in ReactTextAnchorViewManager

Summary:
Since minsdk version was increased to 23, we are deleting code using Android APIs < 23 for class ReactTextAnchorViewManager

chnagelog: [Android][Breaking] Remove support for Android API < 23 in ReactTextAnchorViewManager

Differential Revision: D48545519

fbshipit-source-id: d9771a8a9f20509e76a10cda873c91e9114bde80

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/text/ReactTextAnchorViewManager.java

@@ -7,7 +7,6 @@
 
 package com.facebook.react.views.text;
 
-import android.os.Build;
 import android.text.Layout;
 import android.text.Spannable;
 import android.text.TextUtils;
@@ -118,10 +117,6 @@ public void setSelectionColor(ReactTextView view, @Nullable Integer color) {
 
   @ReactProp(name = "android_hyphenationFrequency")
   public void setAndroidHyphenationFrequency(ReactTextView view, @Nullable String frequency) {
-    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
-      FLog.w(TAG, "android_hyphenationFrequency only available since android 23");
-      return;
-    }
     if (frequency == null || frequency.equals("none")) {
       view.setHyphenationFrequency(Layout.HYPHENATION_FREQUENCY_NONE);
     } else if (frequency.equals("full")) {