Remove service-compiler related code.

samples/github/android/GithubSample/app/build.gradle

-apply plugin: 'com.android.application'
-
-android {
-    compileSdkVersion 22
-    buildToolsVersion "23.0.0"
-
-    defaultConfig {
-        applicationId "com.google.dartino.githubsample"
-        minSdkVersion 21
-        targetSdkVersion 22
-        versionCode 1
-        versionName "1.0"
-    }
-
-    buildTypes {
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
-        }
-    }
-
-    sourceSets {
-        main {
-            java.srcDir '../../../generated/immi/java'
-            java.srcDir '../../../../../pkg/immi_samples/lib/android/src/main'
-        }
-    }
-}
-
-dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:21.0.2'
-    compile 'com.android.support:cardview-v7:21.0.+'
-    compile 'com.android.support:recyclerview-v7:21.0.+'
-}