Move ExternalLocation to clean::types

It was previously defined in `render::search_index` but wasn't used at
all there. `clean::types` seems like a better fit since that's where
`ExternalCrate` is defined.

src/librustdoc/clean/types.rs

@@ -38,7 +38,6 @@ use crate::clean::Clean;
 use crate::core::DocContext;
 use crate::formats::cache::Cache;
 use crate::formats::item_type::ItemType;
-use crate::html::render::search_index::ExternalLocation;
 use crate::html::render::Context;
 
 crate use self::FnRetTy::*;
@@ -337,6 +336,16 @@ impl ExternalCrate {
     }
 }
 
+/// Indicates where an external crate can be found.
+crate enum ExternalLocation {
+    /// Remote URL root of the external crate
+    Remote(String),
+    /// This external crate can be found in the local doc/ folder
+    Local,
+    /// The external crate could not be found.
+    Unknown,
+}
+
 /// Anything with a source location and set of attributes and, optionally, a
 /// name. That is, anything that can be documented. This doesn't correspond
 /// directly to the AST's concept of an item; it's a strict superset.

src/librustdoc/formats/cache.rs

@@ -6,13 +6,13 @@ use rustc_middle::middle::privacy::AccessLevels;
 use rustc_middle::ty::TyCtxt;
 use rustc_span::symbol::sym;
 
-use crate::clean::{self, ExternalCrate, ItemId, PrimitiveType};
+use crate::clean::{self, types::ExternalLocation, ExternalCrate, ItemId, PrimitiveType};
 use crate::core::DocContext;
 use crate::fold::DocFolder;
 use crate::formats::item_type::ItemType;
 use crate::formats::Impl;
 use crate::html::markdown::short_markdown_summary;
-use crate::html::render::search_index::{get_index_search_type, ExternalLocation};
+use crate::html::render::search_index::get_index_search_type;
 use crate::html::render::IndexItem;
 
 /// This cache is used to store information about the [`clean::Crate`] being

src/librustdoc/html/format.rs

@@ -21,10 +21,12 @@ use rustc_middle::ty::TyCtxt;
 use rustc_span::def_id::CRATE_DEF_INDEX;
 use rustc_target::spec::abi::Abi;
 
-use crate::clean::{self, utils::find_nearest_parent_module, ExternalCrate, ItemId, PrimitiveType};
+use crate::clean::{
+    self, types::ExternalLocation, utils::find_nearest_parent_module, ExternalCrate, ItemId,
+    PrimitiveType,
+};
 use crate::formats::item_type::ItemType;
 use crate::html::escape::Escape;
-use crate::html::render::search_index::ExternalLocation;
 use crate::html::render::Context;
 
 use super::url_parts_builder::UrlPartsBuilder;

src/librustdoc/html/render/context.rs

@@ -14,7 +14,7 @@ use rustc_span::source_map::FileName;
 use rustc_span::symbol::sym;
 
 use super::print_item::{full_path, item_path, print_item};
-use super::search_index::{build_index, ExternalLocation};
+use super::search_index::build_index;
 use super::templates;
 use super::write_shared::write_shared;
 use super::{
@@ -22,7 +22,7 @@ use super::{
     BASIC_KEYWORDS,
 };
 
-use crate::clean::{self, ExternalCrate};
+use crate::clean::{self, types::ExternalLocation, ExternalCrate};
 use crate::config::RenderOptions;
 use crate::docfs::{DocFS, PathError};
 use crate::error::Error;

src/librustdoc/html/render/search_index.rs

@@ -13,16 +13,6 @@ use crate::formats::item_type::ItemType;
 use crate::html::markdown::short_markdown_summary;
 use crate::html::render::{IndexItem, IndexItemFunctionType, RenderType, TypeWithKind};
 
-/// Indicates where an external crate can be found.
-crate enum ExternalLocation {
-    /// Remote URL root of the external crate
-    Remote(String),
-    /// This external crate can be found in the local doc/ folder
-    Local,
-    /// The external crate could not be found.
-    Unknown,
-}
-
 /// Builds the search index from the collected metadata
 crate fn build_index<'tcx>(krate: &clean::Crate, cache: &mut Cache, tcx: TyCtxt<'tcx>) -> String {
     let mut defid_to_pathid = FxHashMap::default();

src/librustdoc/json/mod.rs

@@ -19,12 +19,11 @@ use rustc_session::Session;
 use rustdoc_json_types as types;
 
 use crate::clean;
-use crate::clean::ExternalCrate;
+use crate::clean::types::{ExternalCrate, ExternalLocation};
 use crate::config::RenderOptions;
 use crate::error::Error;
 use crate::formats::cache::Cache;
 use crate::formats::FormatRenderer;
-use crate::html::render::search_index::ExternalLocation;
 use crate::json::conversions::{from_item_id, IntoWithTcx};
 
 #[derive(Clone)]