Remove rustc_error_messages/messages.ftl.

It's empty, and it doesn't even make sense, because
`rustc_error_messages` is a lower-level crate than `rustc_errors`.

Author: nnethercote

Cargo.lock

@@ -3771,7 +3771,6 @@ dependencies = [
  "intl-memoizer",
  "rustc_baked_icu_data",
  "rustc_data_structures",
- "rustc_fluent_macro",
  "rustc_macros",
  "rustc_serialize",
  "rustc_span",

compiler/rustc_driver_impl/src/lib.rs

@@ -114,7 +114,6 @@ pub static DEFAULT_LOCALE_RESOURCES: &[&str] = &[
     rustc_builtin_macros::DEFAULT_LOCALE_RESOURCE,
     rustc_codegen_ssa::DEFAULT_LOCALE_RESOURCE,
     rustc_const_eval::DEFAULT_LOCALE_RESOURCE,
-    rustc_error_messages::DEFAULT_LOCALE_RESOURCE,
     rustc_errors::DEFAULT_LOCALE_RESOURCE,
     rustc_expand::DEFAULT_LOCALE_RESOURCE,
     rustc_hir_analysis::DEFAULT_LOCALE_RESOURCE,

compiler/rustc_error_messages/Cargo.toml

@@ -13,7 +13,6 @@ icu_provider_adapters = "1.2"
 intl-memoizer = "0.5.1"
 rustc_baked_icu_data = { path = "../rustc_baked_icu_data" }
 rustc_data_structures = { path = "../rustc_data_structures" }
-rustc_fluent_macro = { path = "../rustc_fluent_macro" }
 rustc_macros = { path = "../rustc_macros" }
 rustc_serialize = { path = "../rustc_serialize" }
 rustc_span = { path = "../rustc_span" }

compiler/rustc_error_messages/messages.ftl

@@ -15,7 +15,6 @@ use fluent_bundle::FluentResource;
 use fluent_syntax::parser::ParserError;
 use icu_provider_adapters::fallback::{LocaleFallbackProvider, LocaleFallbacker};
 use rustc_data_structures::sync::{IntoDynSyncSend, Lrc};
-use rustc_fluent_macro::fluent_messages;
 use rustc_macros::{Decodable, Encodable};
 use rustc_span::Span;
 use std::borrow::Cow;
@@ -38,8 +37,6 @@ use intl_memoizer::IntlLangMemoizer;
 pub use fluent_bundle::{self, types::FluentType, FluentArgs, FluentError, FluentValue};
 pub use unic_langid::{langid, LanguageIdentifier};
 
-fluent_messages! { "../messages.ftl" }
-
 pub type FluentBundle =
     IntoDynSyncSend<fluent_bundle::bundle::FluentBundle<FluentResource, IntlLangMemoizer>>;