Merge pull request #5201 from sipa/order

Remove file and class order guidelines

doc/coding.md

@@ -12,20 +12,6 @@ gradually.
   - No indentation for public/protected/private or for namespaces.
   - No extra spaces inside parenthesis; don't do ( this )
   - No space after function names; one space after if, for and while.
-- Includes need to be ordered alphabetically, separate own and foreign headers with a new-line (example key.cpp):
-```c++
-#include "key.h"
-
-#include "crypto/sha2.h"
-#include "util.h"
-
-#include <openssl/foo.h>
-```
-- Class or struct keywords in header files need to be ordered alphabetically:
-```c++
-class CAlpha;
-class CBeta;
-```
 
 Block style example:
 ```c++