Removing Specific Keys from Delegations using Notary CLI

6th chunk of `content/manuals/engine/security/trust/trust_delegation.md`

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   ROLE                PATHS             KEY IDS                                                             THRESHOLD
   ----                -----             -------                                                             ---------
   targets/jeff        "" <all paths>    8fb597cbaf196f0781628b2f52bff6b3912e4e8075720378fda60d17232bbcf9    1
                                         1091060d7bfd938dfa5be703fa057974f9322a4faef6f580334f3d6df44c02d1    
   targets/releases    "" <all paths>    8fb597cbaf196f0781628b2f52bff6b3912e4e8075720378fda60d17232bbcf9    1
                                         1091060d7bfd938dfa5be703fa057974f9322a4faef6f580334f3d6df44c02d1    
   ```

2) Remove from the `targets/releases` delegation

   ```console
   $ notary delegation remove registry.example.com/admin/demo targets/releases 1091060d7bfd938dfa5be703fa057974f9322a4faef6f580334f3d6df44c02d1 --publish
   
   Auto-publishing changes to registry.example.com/admin/demo
   Enter username: admin
   Enter password: 
   Enter passphrase for targets key with ID b0014f8: 
   Successfully published changes for repository registry.example.com/admin/demo
   ```

3) Remove from the `targets/<name>` delegation

   ```console
   $ notary delegation remove registry.example.com/admin/demo targets/jeff 1091060d7bfd938dfa5be703fa057974f9322a4faef6f580334f3d6df44c02d1 --publish
   
   Removal of delegation role targets/jeff with keys [5570b88df0736c468493247a07e235e35cf3641270c944d0e9e8899922fc6f99], to repository "registry.example.com/admin/demo" staged for next publish.
   
   Auto-publishing changes to registry.example.com/admin/demo
   Enter username: admin    
   Enter password: 
   Enter passphrase for targets key with ID b0014f8: 
   Successfully published changes for repository registry.example.com/admin/demo
   ```

4) Check the remaining delegation list 

   ```console
   $ notary delegation list registry.example.com/admin/demo
   
   ROLE                PATHS             KEY IDS                                                             THRESHOLD
   ----                -----             -------                                                             ---------
   targets/jeff        "" <all paths>    8fb597cbaf196f0781628b2f52bff6b3912e4e8075720378fda60d17232bbcf9    1    
   targets/releases    "" <all paths>    8fb597cbaf196f0781628b2f52bff6b3912e4e8075720378fda60d17232bbcf9    1    
   ```

### Removing a local delegation private key

As part of rotating delegation keys, you may need to remove a local delegation

Title: Removing Specific Keys from Delegations using Notary CLI

Summary

This section demonstrates how to remove specific keys from both the `targets/releases` and signer-specific delegations using the Notary CLI. It involves identifying the Key ID, removing it from both delegation roles (`targets/releases` and `targets/<name>`) using `notary delegation remove`, and verifying the changes using `notary delegation list`. The process includes providing credentials and passphrases for publishing changes.