Revert "after npx cap add ... for ios & android"

This reverts commit 17f304ddb8.

android/app/src/androidTest/java/com/getcapacitor/myapp/ExampleInstrumentedTest.java

@@ -1,26 +0,0 @@
-package com.getcapacitor.myapp;
-
-import static org.junit.Assert.*;
-
-import android.content.Context;
-import androidx.test.ext.junit.runners.AndroidJUnit4;
-import androidx.test.platform.app.InstrumentationRegistry;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-@RunWith(AndroidJUnit4.class)
-public class ExampleInstrumentedTest {
-
-    @Test
-    public void useAppContext() throws Exception {
-        // Context of the app under test.
-        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
-
-        assertEquals("com.getcapacitor.app", appContext.getPackageName());
-    }
-}