Add contract alias remove.

[fnando]

What

Add command to remove contract aliases.

$ cat ~/.config/soroban/contract-ids/increment.json
{"ids":{"Test SDF Network ; September 2015":"CCYBGMETD5TYZJ2ZBT3JBBCWODYJJWP274JA4LX4S7JGNUNQPXZBMNUY"}}%

$ cargo run contract alias remove increment --network standalone --global
   Compiling soroban-cli v21.4.1 (/Users/fnando/Projects/stellar/stellar-cli/cmd/soroban-cli)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.22s
     Running `target/debug/soroban contract alias remove increment --network standalone --global`
ℹ️ Network passphrase: Standalone Network ; February 2017
error: no contract found with alias `increment`

$ cargo run contract alias remove increment --network testnet --global
   Compiling soroban-cli v21.4.1 (/Users/fnando/Projects/stellar/stellar-cli/cmd/soroban-cli)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.01s
     Running `target/debug/soroban contract alias remove increment --network testnet --global`
ℹ️ Network passphrase: Test SDF Network ; September 2015
ℹ️ Contract is CCYBGMETD5TYZJ2ZBT3JBBCWODYJJWP274JA4LX4S7JGNUNQPXZBMNUY
✅ Contract alias has been removed

$ cat ~/.config/soroban/contract-ids/increment.json
{"ids":{}}%

Why

#1420

Known limitations

N/A

[leighmcculloch]

Couple requests inline.

[leighmcculloch]

"has been" is unnecessary

Suggested change

	print.checkln(format!("Contract alias '{alias}' has been removed"));
	print.checkln(format!("Contract alias '{alias}' removed"));

[langer933]

Fdff