patch 8.2.4727: unused code

Problem:    Unused code.
Solution:   Remove code and add #ifdefs. (Dominique Pellé, closes #10136)

runtime/doc/editing.txt

@@ -1224,7 +1224,7 @@ Examples: >
 
 If you want to always use ":confirm", set the 'confirm' option.
 
-			*:browse* *:bro* *E338* *E614* *E615* *E616*
+			*:browse* *:bro* *E338*
 :bro[wse] {command}	Open a file selection dialog for an argument to
 			{command}.  At present this works for |:e|, |:w|,
 			|:wall|, |:wq|, |:wqall|, |:x|, |:xall|, |:exit|,

runtime/doc/eval.txt

@@ -181,7 +181,7 @@ You will not get an error if you try to change the type of a variable.
 
 
 1.2 Function references ~
-				*Funcref* *E695* *E718* *E1086* *E1192*
+				*Funcref* *E695* *E718* *E1192*
 A Funcref variable is obtained with the |function()| function, the |funcref()|
 function or created with the lambda expression |expr-lambda|.  It can be used
 in an expression in the place of a function name, before the parenthesis

runtime/doc/vim9.txt

@@ -378,7 +378,7 @@ And with autocommands: >
 Although using a :def function probably works better.
 
 				*E1022* *E1103* *E1130* *E1131* *E1133*
-				*E1134* *E1235*
+				*E1134*
 Declaring a variable with a type but without an initializer will initialize to
 false (for bool), empty (for string, list, dict, etc.) or zero (for number,
 any, etc.).  This matters especially when using the "any" type, the value will