chore: resolve compiler warnings

Author: calebcartwright

src/items.rs

@@ -6,7 +6,7 @@ use std::cmp::{max, min, Ordering};
 use regex::Regex;
 use rustc_ast::visit;
 use rustc_ast::{ast, ptr};
-use rustc_span::{symbol::kw, symbol::Ident, BytePos, Span};
+use rustc_span::{symbol::kw, symbol::Ident, BytePos, Span, DUMMY_SP};
 
 use crate::attr::filter_inline_attrs;
 use crate::comment::{
@@ -31,7 +31,12 @@ use crate::stmt::Stmt;
 use crate::utils::*;
 use crate::vertical::rewrite_with_alignment;
 use crate::visitor::FmtVisitor;
-use crate::DEFAULT_VISIBILITY;
+
+const DEFAULT_VISIBILITY: ast::Visibility = ast::Visibility {
+    kind: ast::VisibilityKind::Inherited,
+    span: DUMMY_SP,
+    tokens: None,
+};
 
 fn type_annotation_separator(config: &Config) -> &str {
     colon_spaces(config)
@@ -987,7 +992,7 @@ impl<'a> StructParts<'a> {
         matches!(self.def, StructPartsVariantData::Tuple(..))
     }
 
-    pub(crate) fn from_variant(variant: &'a ast::Variant) -> Self {
+    fn from_variant(variant: &'a ast::Variant) -> Self {
         StructParts {
             prefix: "",
             ident: variant.ident,

src/lib.rs

@@ -31,7 +31,7 @@ use std::rc::Rc;
 
 use ignore;
 use rustc_ast::ast;
-use rustc_span::{symbol, DUMMY_SP};
+use rustc_span::symbol;
 use thiserror::Error;
 
 use crate::comment::LineClasses;
@@ -95,11 +95,6 @@ mod types;
 mod vertical;
 pub(crate) mod visitor;
 
-const DEFAULT_VISIBILITY: ast::Visibility = ast::Visibility {
-    kind: ast::VisibilityKind::Inherited,
-    span: DUMMY_SP,
-    tokens: None,
-};
 /// The various errors that can occur during formatting. Note that not all of
 /// these can currently be propagated to clients.
 #[derive(Error, Debug)]

src/types.rs

@@ -2,7 +2,7 @@ use std::iter::ExactSizeIterator;
 use std::ops::Deref;
 
 use rustc_ast::ast::{self, FnRetTy, Mutability};
-use rustc_span::{symbol::kw, symbol::Ident, BytePos, Pos, Span};
+use rustc_span::{symbol::kw, BytePos, Pos, Span};
 
 use crate::config::lists::*;
 use crate::config::{IndentStyle, TypeDensity, Version};
@@ -24,7 +24,6 @@ use crate::utils::{
     colon_spaces, extra_offset, first_line_width, format_extern, format_mutability,
     last_line_extendable, last_line_width, mk_sp, rewrite_ident,
 };
-use crate::DEFAULT_VISIBILITY;
 use crate::{
     comment::{combine_strs_with_missing_comments, contains_comment},
     items::format_struct_struct,