Remove unsed entries from .gitignore

.gitignore

@@ -1,26 +1,15 @@
-# Ignore Gradle project-specific cache directory
-.gradle
-
-# Ignore Gradle build output directory
-build
-
 .idea
 out/
 catalog-v*.xml
 
-.cache
-
 # The diagrams are generated at build time
 docs/src/docs/asciidoc/images/generated/*.svg
 
-**/.jqwik-database
+docs/src/docs/asciidoc/index.html
 
+**/.jqwik-database
 **/src/generated/java
-
 */lombok.config
-
 **/.flattened-pom.xml
-
 */target
-
-**/src-gen
+**/src-gen