docs: remove FAQ section

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

README.md

@@ -164,21 +164,22 @@ See the detail information about [SSH login without password](http://www.linuxpr
 * Change the permissions of `.ssh/authorized_keys2` to 640
 
 ### If you are using OpenSSH
+
 If you are currently using OpenSSH and are getting the following error:
 
 ```bash
 ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey]
 ```
 
-Make sure that your key algorithm of choice is supported.
+Make sure that your key algorithm of choice is supported. On Ubuntu 20.04 or later you must explicitly allow the use of the ssh-rsa algorithm. Add the following line to your OpenSSH daemon file (which is either `/etc/ssh/sshd_config` or a drop-in file under 
-On Ubuntu 20.04 or later you must explicitly allow the use of the ssh-rsa algorithm. Add the following line to your OpenSSH daemon file (which is either `/etc/ssh/sshd_config` or a drop-in file under 
 `/etc/ssh/sshd_config.d/`):
 
-```
+```bash
 CASignatureAlgorithms +ssh-rsa
 ```
 
 Alternatively, `ed25519` keys are accepted by default in OpenSSH. You could use this instead of rsa if needed:
+
 ```bash
 ssh-keygen -t ed25519 -a 200 -C "your_email@example.com"
 ```
@@ -418,25 +419,6 @@ Now you can adjust you config:
         ls -al
 ```
 
-## FAQ
-
-### Login with an EC2 instance
-
-See the [solution](https://github.com/appleboy/ssh-action/issues/80#issuecomment-1130407377). Open the following file
-
-```sh
-/etc/ssh/sshd_config
-```
-
-and add the following configuration
-
-```sh
-PubkeyAuthentication yes
-PubkeyAcceptedKeyTypes=+ssh-rsa
-```
-
-restart the ssh server finally.
-
 ## Contributing
 
 We would love for you to contribute to `appleboy/ssh-action`, pull requests are welcome!