Remove no longer needed android.useAndroidX=true

Author: TheLastProject

gradle.properties

@@ -14,7 +14,6 @@ org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
 # AndroidX package structure to make it clearer which packages are bundled with the
 # Android operating system, and which are packaged with your app's APK
 # https://developer.android.com/topic/libraries/support-library/androidx-rn
-android.useAndroidX=true
 android.usesSdkInManifest.disallowed=false
 android.dependency.useConstraints=true
 android.r8.strictFullModeForKeepRules=false