Update guide-chapter-2.md

Fixing small issues

info/guide/guide-chapter-2.md

@@ -82,8 +82,6 @@ fun isEmptyList(list: List<String>) = list.size == 0
 ```
 
 Note: You can skip KDocs for a method's override if it is almost the same as the superclass method.
-###  <a name="r2.1.2"></a>Rule 2.1.2: Describing methods with arguments, return value or can throw exceptions
-When the method has arguments, return value, or can throw exceptions, it must be described in the KDoc block: with @param, @return, @throws
 
 ### <a name="r2.1.2"></a>Rule 2.1.2: When the method has arguments, return value, can throw exceptions, etc., it must be described in the KDoc block: with @param, @return, @throws, etc.
 
@@ -309,4 +307,4 @@ They should all have a unified style to facilitate the unified text search proce
 // FIXME: Jira-XXX - fix NPE in this code block
 ```
 
-At a version development stage, these annotations can be used to highlight the issues in the code, but all of them should be fixed before a new product version is released.
+At a version development stage, these annotations can be used to highlight the issues in the code, but all of them should be fixed before a new product version is released.