Remove unnecessary webauthn4j dependency

Author: rwinch

docs/modules/ROOT/pages/servlet/authentication/passkeys.adoc

@@ -10,7 +10,7 @@ After the credential is registered, it can be used to authenticate by xref:servl
 [[passkeys-dependencies]]
 == Required Dependencies
 
-To get started, add the `webauthn4j-core` dependency to your project.
+To get started, add the `spring-security-webauthn` dependency to your project.
 
 [NOTE]
 ====
@@ -28,11 +28,6 @@ Maven::
     <groupId>org.springframework.security</groupId>
     <artifactId>spring-security-webauthn</artifactId>
 </dependency>
-<dependency>
-    <groupId>com.webauthn4j</groupId>
-    <artifactId>webauthn4j-core</artifactId>
-    <version>{webauthn4j-core-version}</version>
-</dependency>
 ----
 
 Gradle::
@@ -41,7 +36,6 @@ Gradle::
 ----
 dependencies {
     implementation "org.springframework.security:spring-security-webauthn"
-    implementation "com.webauthn4j:webauthn4j-core:{webauthn4j-core-version}"
 }
 ----
 ======