Remove redundant throws declarations from non public API

Closes gh-828

docs/src/test/java/com/example/restassured/EveryTestPreprocessing.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2021 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.
@@ -50,7 +50,7 @@ public class EveryTestPreprocessing {
 	}
 	// end::setup[]
 
-	public void use() throws Exception {
+	public void use() {
 		// tag::use[]
 		RestAssured.given(this.spec)
 				.filter(document("index", links(linkWithRel("self").description("Canonical self link")))).when()