docs(sample): remove unused dependency and add setup instructions (#2010)

Author: mpeddada1

samples/native-image-sample/README.md

@@ -4,7 +4,42 @@ The BigQuery sample application demonstrates some common operations with [Google
 
 ## Setup Instructions
 
-1. Follow the [GCP Project Authentication and Native Image Setup Instructions](../../README.md).
+## Setup Instructions
+
+You will need to follow these prerequisite steps in order to run the samples:
+
+1. If you have not already, [create a Google Cloud Platform Project](https://cloud.google.com/resource-manager/docs/creating-managing-projects#creating_a_project).
+
+2. Install the [Google Cloud SDK](https://cloud.google.com/sdk/) which will allow you to run the sample with your project's credentials.
+
+   Once installed, log in with Application Default Credentials using the following command:
+
+    ```
+    gcloud auth application-default login
+    ```
+
+   **Note:** Authenticating with Application Default Credentials is convenient to use during development, but we recommend [alternate methods of authentication](https://cloud.google.com/docs/authentication/production) during production use.
+
+3. Install the native image compiler.
+
+   You can follow [the installation instructions](https://www.graalvm.org/docs/getting-started/#install-graalvm) from the GraalVM website.
+   After following the instructions, ensure that you install the native image extension installed by running:
+
+    ```
+    gu install native-image
+    ```
+
+   Once you finish following the instructions, verify that the default version of Java is set to the GraalVM version by running `java -version` in a terminal.
+
+   You will see something similar to the below output:
+
+    ```
+    $ java -version
+   
+    openjdk version "11.0.7" 2020-04-14
+    OpenJDK Runtime Environment GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02)
+    OpenJDK 64-Bit Server VM GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02, mixed mode, sharing)
+    ```
 
 2. [Enable the BigQuery APIs](https://console.cloud.google.com/apis/api/bigquery.googleapis.com).
 

samples/native-image-sample/pom.xml

@@ -90,11 +90,6 @@
       <id>native</id>
 
       <dependencies>
-        <dependency>
-          <groupId>com.google.cloud</groupId>
-          <artifactId>native-image-support</artifactId>
-          <version>0.13.1</version>
-        </dependency>
         <dependency>
           <groupId>org.junit.vintage</groupId>
           <artifactId>junit-vintage-engine</artifactId>