chore: remove jcenter from gradle

Signed-off-by: Francesco-Voto <francesco.voto@nearform.com>

Author: Francesco-Voto

packages/askar-react-native/android/build.gradle

@@ -4,7 +4,6 @@ import java.nio.file.Paths
 buildscript {
   repositories {
     google()
-    jcenter()
     mavenCentral()
   }