chore: remove toml support from the codebase

[ICavlek]

Leftovers of toml config support can be found in the codebase. It can be cleaned up and completely removed

[eloylp]

Can you paste some references for future clarity ? :)

[ICavlek]

Can you paste some references for future clarity ? :)

Ofcourse, here we have a complete test for the toml parsing:

axelar-solana-relayer/crates/solana-axelar-relayer/src/main.rs

Line 143 in 04128c0

fn parse_toml() -> eyre::Result<()> {

And it seems to me that serde and builder on all of the config vars could be removed since we have migrated to env.

axelar-solana-relayer/crates/solana-listener/src/config.rs

Lines 16 to 20 in 04128c0

	#[serde(deserialize_with = "common_serde_utils::pubkey_decode")]
	#[builder(default = config_defaults::gateway_program_address())]
	#[serde(default = "config_defaults::gateway_program_address")]
	#[arg(env = "GATEWAY_PROGRAM_ADDRESS")]
	pub gateway_program_address: Pubkey,

These are not vital changes, but for cleaner code, they could be removed after mainnet launch.