Merge #241: chore: remove remainig MSRV mentions

4347ea2 chore: clippy fixes (Vadim Anufriev)
09b5b3b chore: remove remainig msrv mentions (Vadim Anufriev)

Pull request description:

  Relates #211.

  ### Description

  I noticed that we still have mentions of MSRV, despite the fact that MSRV was removed in #211.
  In this PR I'm removing the found mentions.

  ### Checklists

  #### All Submissions:

  * [x] I've signed all my commits
  * [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk-cli/blob/master/CONTRIBUTING.md)
  * [x] I ran `cargo fmt` and `cargo clippy` before committing

ACKs for top commit:
  tvpeter:
    ACK 4347ea2
  notmandatory:
    ACK 4347ea2

Tree-SHA512: 6a3d8efcf7e70ebf5b5dce2e49eba5af41ef6cb22052db78dd3b00e77052b746285d55cd8b571a914f7d3e0b926382be220fe8a0a1d225366c6075a38cf752fa

Author: tvpeter

Justfile

@@ -1,5 +1,4 @@
 set quiet := true
-msrv := "1.75.0"
 default_wallet := 'regtest_default_wallet'
 default_datadir := "$HOME/.bdk-bitcoin"
 rpc_user := 'user'
@@ -42,10 +41,6 @@ clean:
 stable: clean
     rustup override set stable; cargo update
 
-# set the rust version to the msrv and pin dependencies
-msrv: clean
-    rustup override set {{msrv}}; cargo update; ./ci/pin-msrv.sh
-
 # start regtest bitcoind in default data directory
 [group('rpc')]
 start:

clippy.toml

@@ -364,10 +364,10 @@ pub fn handle_offline_wallet_subcommand(
                 tx_builder.include_output_redeem_witness_script();
             }
 
-            if let Some(fee_rate) = fee_rate {
-                if let Some(fee_rate) = FeeRate::from_sat_per_vb(fee_rate as u64) {
-                    tx_builder.fee_rate(fee_rate);
-                }
+            if let Some(fee_rate) = fee_rate
+                && let Some(fee_rate) = FeeRate::from_sat_per_vb(fee_rate as u64)
+            {
+                tx_builder.fee_rate(fee_rate);
             }
 
             if let Some(utxos) = utxos {
@@ -770,14 +770,14 @@ pub fn handle_config_subcommand(
         );
     }
 
-    if let Some(ref internal_desc) = int_descriptor {
-        if internal_desc.contains("xprv") || internal_desc.contains("tprv") {
-            eprintln!(
-                "WARNING: Your internal descriptor contains PRIVATE KEYS.
+    if let Some(ref internal_desc) = int_descriptor
+        && (internal_desc.contains("xprv") || internal_desc.contains("tprv"))
+    {
+        eprintln!(
+            "WARNING: Your internal descriptor contains PRIVATE KEYS.
                  Private keys will be saved in PLAINTEXT in the config file.
                  This is a security risk. Consider using public descriptors instead.\n"
-            );
-        }
+        );
     }
 
     let mut config = WalletConfig::load(datadir)?.unwrap_or(WalletConfig {