remove rendering comment issue

[nuke-web3]

remove block comment to fix rendering issues.

New issue to fix latter on: #1034

Closes #1028

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<!-- FIXME! The `insert` command is _only_ for the key sub-command embedded in nodes. Not for subkey - we need to point this out... -->
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## Inserting Keys to a Node's Keystore

You can insert fixed keys into a Substrate-based node's keystore with the `insert` command. It is common to use the
same secret, but with different scheme for substrate key use:

_Command (Sr25519 - AURA key):_
```bash
node key inspect "caution juice atom organ advance problem want pledge someone senior holiday very" --scheme sr25519

Output:

Secret phrase `caution juice atom organ advance problem want pledge someone senior holiday very` is account:
  Secret seed:       0xc8fa03532fb22ee1f7f6908b9c02b4e72483f0dbd66e4cd456b8f34c6230b849
  Public key (hex):  0xbd7436a22571207d018ffe83f5dc77d0750b7777f1eb169053d40201d6c68d53
  Public key (SS58): 5GM7RtekqU8cGiS4MKQ7tufoH4Q1itzmoFpVcvcPfjksyPrw
  Account ID:        0xbd7436a22571207d018ffe83f5dc77d0750b7777f1eb169053d40201d6c68d53
  SS58 Address:      5GM7RtekqU8cGiS4MKQ7tufoH4Q1itzmoFpVcvcPfjksyPrw

---

Command (Ed25519 - GRANDPA key):

node key inspect "caution juice atom organ advance problem want pledge someone senior holiday very" --scheme ed25519

Output:

Secret phrase `caution juice atom organ advance problem want pledge someone senior holiday very` is account:
  Secret seed:       0xc8fa03532fb22ee1f7f6908b9c02b4e72483f0dbd66e4cd456b8f34c6230b849
  Public key (hex):  0xbd7436a22571207d018ffe83f5dc77d0750b7777f1eb169053d40201d6c68d53
  Public key (SS58): 5GM7RtekqU8cGiS4MKQ7tufoH4Q1itzmoFpVcvcPfjksyPrw
  Account ID:        0xbd7436a22571207d018ffe83f5dc77d0750b7777f1eb169053d40201d6c68d53
  SS58 Address:      5GM7RtekqU8cGiS4MKQ7tufoH4Q1itzmoFpVcvcPfjksyPrw

---

Command (ECDSA - BEEFY key):

node key inspect "caution juice atom organ advance problem want pledge someone senior holiday very" --scheme ecdsa

Output:

Secret phrase `caution juice atom organ advance problem want pledge someone senior holiday very` is account:
  Secret seed:       0xc8fa03532fb22ee1f7f6908b9c02b4e72483f0dbd66e4cd456b8f34c6230b849
  Public key (hex):  0x03b2217d2c348df72c4789947291e2e63ba7798baebaa937f40fd5d68f022dd4b4
  Public key (SS58): KWCjsULBCExp8BTVhVjVjWrqMYxSi4a1CRyU2tyzNiAs4mLk8
  Account ID:        0x9bd03f5c43588e0e8110463dde4122bce1279d683de87e95975f7c717f00d617
  SS58 Address:      5Fb19AznKQqtHLf82PfMXKwWPqAWPB9g7fW6AhP8BVJ8Soqo

---

Now you can use the insert sub-command to save these keys appropriately for use by your node, all
we require is the base path, key type, and correct scheme used to do so with a given secret URI:

Command:

# Usage
# node key insert [FLAGS] [OPTIONS] --key-type <key-type>

# Example: Inserting an Aura key (SR25519 Crypto)
node key insert --suri 0xc8fa03532fb22ee1f7f6908b9c02b4e72483f0dbd66e4cd456b8f34c6230b849 --base-path /tmp/node01 --key-type aura

# Example: Inserting a Grandpa key (ED25519 Crypto)
node key insert --suri 0xc8fa03532fb22ee1f7f6908b9c02b4e72483f0dbd66e4cd456b8f34c6230b849 --scheme ed25519 --base-path /tmp/node01 --key-type gran

# Example: Inserting a Beefy key (ECDSA Crypto)
node key insert --suri 0xc8fa03532fb22ee1f7f6908b9c02b4e72483f0dbd66e4cd456b8f34c6230b849 --scheme ecdsa --base-path /tmp/node01 --key-type beefy

-->