feat: remove deprecated OOB flow (#2242)

Also remove `google-api-client-java6` module which is empty after removal of `GooglePromptReceiver.java`.

docs/component-modules.md

@@ -43,12 +43,6 @@ Jackson2 extensions to the Google API Client Library for Java
 (`google-api-client-jackson2`). This module depends on `google-api-client` and
 `google-http-client-jackson2`.
 
-## google-api-client-java6
-
-Java 6 (and higher) extensions to the Google API Client Library for Java
-(`google-api-client-java6`). This module depends on `google-api-client` and
-`google-oauth-client-java6`.
-
 ## google-api-client-protobuf
 
 [Protocol buffer][protobuf] extensions to the Google API Client Library for Java

google-api-client-assembly/classpath-include

@@ -3,7 +3,6 @@
 	<classpathentry kind="lib" path="libs/google-api-client-appengine-${project.version}.jar" sourcepath="libs-sources/google-api-client-appengine-${project.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/google-api-client-gson-${project.version}.jar" sourcepath="libs-sources/google-api-client-gson-${project.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/google-api-client-jackson2-${project.version}.jar" sourcepath="libs-sources/google-api-client-jackson2-${project.version}-sources.jar"/>
-	<classpathentry kind="lib" path="libs/google-api-client-java6-${project.version}.jar" sourcepath="libs-sources/google-api-client-java6-${project.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/google-api-client-protobuf-${project.version}.jar" sourcepath="libs-sources/google-api-client-protobuf-${project.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/google-api-client-servlet-${project.version}.jar" sourcepath="libs-sources/google-api-client-servlet-${project.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/google-api-client-xml-${project.version}.jar" sourcepath="libs-sources/google-api-client-xml-${project.version}-sources.jar"/>

google-api-client-assembly/pom.xml

@@ -37,10 +37,6 @@
       <groupId>com.google.api-client</groupId>
       <artifactId>google-api-client-jackson2</artifactId>
     </dependency>
-    <dependency>
-      <groupId>com.google.api-client</groupId>
-      <artifactId>google-api-client-java6</artifactId>
-    </dependency>
     <dependency>
       <groupId>com.google.api-client</groupId>
       <artifactId>google-api-client-protobuf</artifactId>

google-api-client-bom/pom.xml

@@ -91,11 +91,6 @@
         <artifactId>google-api-client-jackson2</artifactId>
         <version>2.1.5-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
-      <dependency>
-        <groupId>com.google.api-client</groupId>
-        <artifactId>google-api-client-java6</artifactId>
-        <version>2.1.5-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
-      </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-protobuf</artifactId>

google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/GoogleOAuthConstants.java

@@ -40,17 +40,5 @@ public class GoogleOAuthConstants {
   public static final String DEFAULT_PUBLIC_CERTS_ENCODED_URL =
       "https://www.googleapis.com/oauth2/v1/certs";
 
-  /**
-   * Redirect URI to use for an installed application as specified in <a
-   * href="https://developers.google.com/identity/protocols/OAuth2InstalledApp">Using OAuth 2.0 for
-   * Mobile & Desktop Apps</a>.
-   *
-   * <p>OAuth out-of-band (oob) flow has been deprecated. To migrate to an alternative flow, please
-   * refer to <a
-   * href="https://developers.googleblog.com/2022/02/making-oauth-flows-safer.html">Making Google
-   * OAuth interactions safer by using more secure OAuth flows</a>.
-   */
-  @Deprecated public static final String OOB_REDIRECT_URI = "urn:ietf:wg:oauth:2.0:oob";
-
   private GoogleOAuthConstants() {}
 }

pom.xml

@@ -78,7 +78,6 @@
     <module>google-api-client-bom</module>
     <module>google-api-client-gson</module>
     <module>google-api-client-jackson2</module>
-    <module>google-api-client-java6</module>
     <module>google-api-client-protobuf</module>
     <module>google-api-client-xml</module>
   </modules>
@@ -178,11 +177,6 @@
         <artifactId>google-api-client-android</artifactId>
         <version>${project.version}</version>
       </dependency>
-      <dependency>
-        <groupId>com.google.api-client</groupId>
-        <artifactId>google-api-client-java6</artifactId>
-        <version>${project.version}</version>
-      </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-gson</artifactId>
@@ -410,10 +404,6 @@
                   <title>google-api-client-jackson2</title>
                   <packages>com.google.api.client.googleapis.notifications.json.jackson2.*</packages>
                 </group>
-                <group>
-                  <title>google-api-client-java6</title>
-                  <packages>com.google.api.client.googleapis.extensions.java6.*</packages>
-                </group>
                 <group>
                   <title>google-api-client-protobuf</title>
                   <packages>com.google.api.client.googleapis.services.protobuf*:com.google.api.client.googleapis.testing.services.protobuf*</packages>