stack_config.md not exist and delete it

Signed-off-by: lixiaobing10051267 <li.xiaobing1@zte.com.cn>
(cherry picked from commit afaff51a8b)
Signed-off-by: Victor Vieux <vieux@docker.com>

docs/reference/commandline/stack_deploy.md

@@ -92,7 +92,6 @@ axqh55ipl40h  vossibility_vossibility-collector  replicated  1/1       icecrime/
 
 ## Related information
 
-* [stack config](stack_config.md)
 * [stack ls](stack_ls.md)
 * [stack ps](stack_ps.md)
 * [stack rm](stack_rm.md)

docs/reference/commandline/stack_ls.md

@@ -41,8 +41,7 @@ myapp              2
 
 ## Related information
 
-* [stack config](stack_config.md)
 * [stack deploy](stack_deploy.md)
-* [stack rm](stack_rm.md)
 * [stack ps](stack_ps.md)
+* [stack rm](stack_rm.md)
 * [stack services](stack_services.md)

docs/reference/commandline/stack_ps.md

@@ -45,8 +45,7 @@ The currently supported filters are:
 
 ## Related information
 
-* [stack config](stack_config.md)
 * [stack deploy](stack_deploy.md)
+* [stack rm](stack_ls.md)
 * [stack rm](stack_rm.md)
 * [stack services](stack_services.md)
-* [stack ls](stack_ls.md)

docs/reference/commandline/stack_rm.md

@@ -32,8 +32,7 @@ a manager node.
 
 ## Related information
 
-* [stack config](stack_config.md)
 * [stack deploy](stack_deploy.md)
-* [stack services](stack_services.md)
-* [stack ps](stack_ps.md)
 * [stack ls](stack_ls.md)
+* [stack ps](stack_ps.md)
+* [stack services](stack_services.md)

docs/reference/commandline/stack_services.md

@@ -64,8 +64,7 @@ The currently supported filters are:
 
 ## Related information
 
-* [stack config](stack_config.md)
 * [stack deploy](stack_deploy.md)
-* [stack rm](stack_rm.md)
-* [stack ps](stack_ps.md)
 * [stack ls](stack_ls.md)
+* [stack ps](stack_ps.md)
+* [stack rm](stack_rm.md)