remove the testing related files

app/build.gradle

@@ -37,8 +37,6 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:23.4.0'
     compile 'com.android.support:design:23.4.0'
     compile 'com.jakewharton:butterknife:8.0.1'

app/src/androidTest/java/com/simplemobiletools/filemanager/ApplicationTest.java

@@ -1,13 +0,0 @@
-package com.simplemobiletools.filemanager;
-
-import android.app.Application;
-import android.test.ApplicationTestCase;
-
-/**
- * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
- */
-public class ApplicationTest extends ApplicationTestCase<Application> {
-    public ApplicationTest() {
-        super(Application.class);
-    }
-}

app/src/test/java/com/simplemobiletools/filemanager/ExampleUnitTest.java

@@ -1,15 +0,0 @@
-package com.simplemobiletools.filemanager;
-
-import org.junit.Test;
-
-import static org.junit.Assert.*;
-
-/**
- * To work on unit tests, switch the Test Artifact in the Build Variants view.
- */
-public class ExampleUnitTest {
-    @Test
-    public void addition_isCorrect() throws Exception {
-        assertEquals(4, 2 + 2);
-    }
-}