Revert "Add maxTargetSdk restriction to unused APIs."

This reverts commit 72f07d6a8a.

Reason for revert: Droidcop-triggered revert due to breakage https://android-build.googleplex.com/builds/quarterdeck?testMethod=testAppZygotePreload&testClass=android.app.cts.ServiceTest&atpConfigName=suite%2Ftest-mapping-presubmit-retry_cloud-tf&testModule=CtsAppTestCases&fkbb=6936597&lkbb=6936969&lkgb=6936551&testResults=true&branch=git_master&target=cf_x86_phone-userdebug>, bug b/171886397

Bug: 171886397
Change-Id: Ibe0f0430a3451477c1ee8ef56a596e91ea1e7672

rs/java/android/renderscript/Font.java

@@ -19,7 +19,6 @@ package android.renderscript;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.AssetManager;
 import android.content.res.Resources;
-import android.os.Build;
 import android.os.Environment;
 
 import java.io.File;
@@ -238,7 +237,7 @@ public class Font extends BaseObj {
      *
      * Returns default font if no match could be found.
      */
-    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    @UnsupportedAppUsage
     static public Font create(RenderScript rs, Resources res, String familyName, Style fontStyle, float pointSize) {
         String fileName = getFontFileName(familyName, fontStyle);
         String fontPath = Environment.getRootDirectory().getAbsolutePath();