doc: remove obsolete files

docs/en/13-operation/06-admin.md

----
-title: User Management
----
-
-A system operator can use TDengine CLI `taos` to create or remove users or change passwords. The SQL commands are documented below:
-
-## Create User
-
-```sql
-CREATE USER <user_name> PASS <'password'>;
-```
-
-When creating a user and specifying the user name and password, the password needs to be quoted using single quotes.
-
-## Drop User
-
-```sql
-DROP USER <user_name>;
-```
-
-Dropping a user can only be performed by root.
-
-## Change Password
-
-```sql
-ALTER USER <user_name> PASS <'password'>;
-```
-
-To keep the case of the password when changing password, the password needs to be quoted using single quotes.
-
-## Change Privilege
-
-```sql
-ALTER USER <user_name> PRIVILEGE <write|read>;
-```
-
-The privileges that can be changed to are `read` or `write` without single quotes.
-
-Note：there is another privilege `super`, which is not allowed to be authorized to any user.
-
-## Show Users
-
-```sql
-SHOW USERS;
-```
-
-:::note
-In SQL syntax, `< >` means the part that needs to be input by the user, excluding the `< >` itself.
-
-:::

docs/en/13-operation/09-status.md

----
-sidebar_label: Connections & Tasks
-title: Manage Connections and Query Tasks
----
-
-A system operator can use the TDengine CLI to show connections, ongoing queries, stream computing, and can close connections or stop ongoing query tasks or stream computing.
-
-## Show Connections
-
-```sql
-SHOW CONNECTIONS;
-```
-
-One column of the output of the above SQL command is "ip:port", which is the end point of the client.
-
-## Force Close Connections
-
-```sql
-KILL CONNECTION <connection-id>;
-```
-
-In the above SQL command, `connection-id` is from the first column of the output of `SHOW CONNECTIONS`.
-
-## Show Ongoing Queries
-
-```sql
-SHOW QUERIES;
-```
-
-The first column of the output is query ID, which is composed of the corresponding connection ID and the sequence number of the current query task started on this connection. The format is "connection-id:query-no".
-
-## Force Close Queries
-
-```sql
-KILL QUERY <query-id>;
-```
-
-In the above SQL command, `query-id` is from the first column of the output of `SHOW QUERIES `.
-
-## Show Continuous Query
-
-```sql
-SHOW STREAMS;
-```
-
-The first column of the output is stream ID, which is composed of the connection ID and the sequence number of the current stream started on this connection. The format is "connection-id:stream-no".
-
-## Force Close Continuous Query
-
-```sql
-KILL STREAM <stream-id>;
-```
-
-The above SQL command, `stream-id` is from the first column of the output of `SHOW STREAMS`.