Remove unused libraries and obsolete instructions from build.gradle and README.md

Author: yuuki3655

runner/AndroidTestOrchestratorWithTestCoverageSample/README.md

@@ -14,15 +14,10 @@ This project uses the Gradle build system. You don't need an IDE to build and ex
 1. Check out the relevant code:
     * The application under test is located in `src/main/java`
     * Tests are in `src/androidTest/java`
-1. Create the test configuration with a custom runner: `androidx.test.runner.AndroidJUnitRunner`
-    * Open *Run* menu | *Edit Configurations*
-    * Add a new *Android Tests* configuration
-    * Choose a module
-    * Add a *Specific instrumentation runner*: `androidx.test.runner.AndroidJUnitRunner`
-1. Connect a device or start an emulator
+1. Connect a device or start an emulator:
     * Turn animations off.
     (On your device, under Settings->Developer options disable the following 3 settings: "Window animation scale", "Transition animation scale" and "Animator duration scale")
-1. Run the newly created configuration
+1. Run the newly created configuration.
 
 The application will be started on the device/emulator and a series of actions will be performed automatically.
 

runner/AndroidTestOrchestratorWithTestCoverageSample/app/build.gradle

@@ -19,12 +19,6 @@ android {
             testCoverageEnabled true
         }
     }
-
-    useLibrary 'android.test.runner'
-
-    useLibrary 'android.test.base'
-    useLibrary 'android.test.mock'
-
     testOptions {
         execution 'ANDROIDX_TEST_ORCHESTRATOR'
     }