[docs] remove linkquality from src/cli/README.md (#7810)

src/cli/README.md

@@ -62,7 +62,6 @@ Done
 - [leaderdata](#leaderdata)
 - [leaderweight](#leaderweight)
 - [linkmetrics](#linkmetrics-mgmt-ipaddr-enhanced-ack-clear)
-- [linkquality](#linkquality-extaddr)
 - [locate](#locate)
 - [log](#log-filename-filename)
 - [mac](#mac-retries-direct)
@@ -1627,25 +1626,6 @@ Done
  - RSSI: -18 (dBm) (Exponential Moving Average)
 ```
 
-### linkquality \<extaddr\>
-
-Get the link quality on the link to a given extended address.
-
-```bash
-> linkquality 36c1dd7a4f5201ff
-3
-Done
-```
-
-### linkquality \<extaddr\> \<linkquality\>
-
-Set the link quality on the link to a given extended address.
-
-```bash
-> linkquality 36c1dd7a4f5201ff 3
-Done
-```
-
 ### locate
 
 Gets the current state (`In Progress` or `Idle`) of anycast locator.