Minor update to project files

app/build.gradle

@@ -14,13 +14,11 @@ android {
     buildTypes {
         release {
             minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
     compile 'com.android.support:appcompat-v7:22.2.1'
     compile 'com.google.android.gms:play-services:7.5.0'
 }