Remove redundant throws declarations from non public API

Closes gh-828

docs/src/test/java/com/example/webtestclient/PathParameters.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2017 the original author or authors.
+ * Copyright 2014-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,7 +28,7 @@ public class PathParameters {
 
 	private WebTestClient webTestClient;
 
-	public void pathParametersSnippet() throws Exception {
+	public void pathParametersSnippet() {
 		// tag::path-parameters[]
 		this.webTestClient.get().uri("/locations/{latitude}/{longitude}", 51.5072, 0.1275) // <1>
 			.exchange().expectStatus().isOk().expectBody()