chore: Fix lints

Author: LukeMathWalker

compiler/pavex_cli/src/activation/mod.rs

@@ -1,3 +1,4 @@
+#![allow(unused_assignments)] // False positive due to fields only used in the Diagnostic/Display impl derived by the miette macro.
 use crate::activation::token::ValidatedClaims;
 use crate::command::Command;
 use crate::locator::PavexLocator;

compiler/pavex_cli_deps/src/installers.rs

@@ -1,3 +1,4 @@
+#![allow(unused_assignments)] // False positives due to fields only used in Display impls.
 use crate::commands::{
     install_rustdoc_json, install_rustup_toolchain, is_cargo_px_installed,
     is_rustdoc_json_installed, is_rustup_installed, is_rustup_toolchain_installed,

compiler/pavex_miette/src/graphical_report_handler.rs

@@ -824,7 +824,6 @@ impl GraphicalReportHandler {
                         };
                         for _ in 0..n_leading_whitespaces {
                             write!(f, " ")?;
-                            curr_offset += 1;
                         }
 
                         let label_line = if i == 0 {

compiler/pavexc/src/compiler/app.rs

@@ -1,5 +1,5 @@
 use std::collections::BTreeSet;
-use std::io::{BufWriter, Write};
+use std::io::Write;
 use std::path::Path;
 
 use ahash::{HashMap, HashMapExt};