Remove DefaultAttributesPreprocessor

See gh-951

spring-restdocs-asciidoctor/src/main/java/org/springframework/restdocs/asciidoctor/DefaultAttributesPreprocessor.java

@@ -1,39 +0,0 @@
-/*
- * Copyright 2014-2021 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.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.restdocs.asciidoctor;
-
-import org.asciidoctor.ast.Document;
-import org.asciidoctor.extension.Preprocessor;
-import org.asciidoctor.extension.PreprocessorReader;
-
-/**
- * {@link Preprocessor} that sets defaults for REST Docs-related {@link Document}
- * attributes.
- *
- * @author Andy Wilkinson
- */
-final class DefaultAttributesPreprocessor extends Preprocessor {
-
-	private final SnippetsDirectoryResolver snippetsDirectoryResolver = new SnippetsDirectoryResolver();
-
-	@Override
-	public void process(Document document, PreprocessorReader reader) {
-		document.setAttribute("snippets", this.snippetsDirectoryResolver.getSnippetsDirectory(document.getAttributes()),
-				false);
-	}
-
-}