diff --git a/Cargo.lock b/Cargo.lock
index 2be69cf0b23bf..659118e47ff5f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3799,7 +3799,6 @@ dependencies = [
  "rustc_metadata",
  "rustc_middle",
  "rustc_mir_build",
- "rustc_mir_dataflow",
  "rustc_mir_transform",
  "rustc_monomorphize",
  "rustc_parse",
@@ -4333,7 +4332,6 @@ dependencies = [
  "rustc_abi",
  "rustc_data_structures",
  "rustc_errors",
- "rustc_fluent_macro",
  "rustc_graphviz",
  "rustc_hir",
  "rustc_index",
diff --git a/compiler/rustc_driver_impl/Cargo.toml b/compiler/rustc_driver_impl/Cargo.toml
index bdc577622b24a..7f01b0e5bd96e 100644
--- a/compiler/rustc_driver_impl/Cargo.toml
+++ b/compiler/rustc_driver_impl/Cargo.toml
@@ -33,7 +33,6 @@ rustc_macros = { path = "../rustc_macros" }
 rustc_metadata = { path = "../rustc_metadata" }
 rustc_middle = { path = "../rustc_middle" }
 rustc_mir_build = { path = "../rustc_mir_build" }
-rustc_mir_dataflow = { path = "../rustc_mir_dataflow" }
 rustc_mir_transform = { path = "../rustc_mir_transform" }
 rustc_monomorphize = { path = "../rustc_monomorphize" }
 rustc_parse = { path = "../rustc_parse" }
diff --git a/compiler/rustc_driver_impl/src/lib.rs b/compiler/rustc_driver_impl/src/lib.rs
index cdc9959605c14..55f78f0e01ab2 100644
--- a/compiler/rustc_driver_impl/src/lib.rs
+++ b/compiler/rustc_driver_impl/src/lib.rs
@@ -130,7 +130,6 @@ pub static DEFAULT_LOCALE_RESOURCES: &[&str] = &[
     rustc_metadata::DEFAULT_LOCALE_RESOURCE,
     rustc_middle::DEFAULT_LOCALE_RESOURCE,
     rustc_mir_build::DEFAULT_LOCALE_RESOURCE,
-    rustc_mir_dataflow::DEFAULT_LOCALE_RESOURCE,
     rustc_mir_transform::DEFAULT_LOCALE_RESOURCE,
     rustc_monomorphize::DEFAULT_LOCALE_RESOURCE,
     rustc_parse::DEFAULT_LOCALE_RESOURCE,
diff --git a/compiler/rustc_mir_dataflow/Cargo.toml b/compiler/rustc_mir_dataflow/Cargo.toml
index e41d5da713979..156caa7030a03 100644
--- a/compiler/rustc_mir_dataflow/Cargo.toml
+++ b/compiler/rustc_mir_dataflow/Cargo.toml
@@ -10,7 +10,6 @@ regex = "1"
 rustc_abi = { path = "../rustc_abi" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }
-rustc_fluent_macro = { path = "../rustc_fluent_macro" }
 rustc_graphviz = { path = "../rustc_graphviz" }
 rustc_hir = { path = "../rustc_hir" }
 rustc_index = { path = "../rustc_index" }
diff --git a/compiler/rustc_mir_dataflow/messages.ftl b/compiler/rustc_mir_dataflow/messages.ftl
deleted file mode 100644
index 3783c647b03ef..0000000000000
--- a/compiler/rustc_mir_dataflow/messages.ftl
+++ /dev/null
@@ -1,17 +0,0 @@
-mir_dataflow_peek_argument_not_a_local =
-    rustc_peek: argument was not a local
-
-mir_dataflow_peek_argument_untracked =
-    rustc_peek: argument untracked
-
-mir_dataflow_peek_bit_not_set =
-    rustc_peek: bit not set
-
-mir_dataflow_peek_must_be_not_temporary =
-    dataflow::sanity_check cannot feed a non-temp to rustc_peek
-
-mir_dataflow_peek_must_be_place_or_ref_place =
-    rustc_peek: argument expression must be either `place` or `&place`
-
-mir_dataflow_stop_after_dataflow_ended_compilation =
-    stop_after_dataflow ended compilation
diff --git a/compiler/rustc_mir_dataflow/src/errors.rs b/compiler/rustc_mir_dataflow/src/errors.rs
index 9d8c34c8a1f35..051c0305cf2b7 100644
--- a/compiler/rustc_mir_dataflow/src/errors.rs
+++ b/compiler/rustc_mir_dataflow/src/errors.rs
@@ -2,39 +2,39 @@ use rustc_macros::Diagnostic;
 use rustc_span::Span;
 
 #[derive(Diagnostic)]
-#[diag(mir_dataflow_stop_after_dataflow_ended_compilation)]
+#[diag("stop_after_dataflow ended compilation")]
 pub(crate) struct StopAfterDataFlowEndedCompilation;
 
 #[derive(Diagnostic)]
-#[diag(mir_dataflow_peek_must_be_place_or_ref_place)]
+#[diag("rustc_peek: argument expression must be either `place` or `&place`")]
 pub(crate) struct PeekMustBePlaceOrRefPlace {
     #[primary_span]
     pub span: Span,
 }
 
 #[derive(Diagnostic)]
-#[diag(mir_dataflow_peek_must_be_not_temporary)]
+#[diag("dataflow::sanity_check cannot feed a non-temp to rustc_peek")]
 pub(crate) struct PeekMustBeNotTemporary {
     #[primary_span]
     pub span: Span,
 }
 
 #[derive(Diagnostic)]
-#[diag(mir_dataflow_peek_bit_not_set)]
+#[diag("rustc_peek: bit not set")]
 pub(crate) struct PeekBitNotSet {
     #[primary_span]
     pub span: Span,
 }
 
 #[derive(Diagnostic)]
-#[diag(mir_dataflow_peek_argument_not_a_local)]
+#[diag("rustc_peek: argument was not a local")]
 pub(crate) struct PeekArgumentNotALocal {
     #[primary_span]
     pub span: Span,
 }
 
 #[derive(Diagnostic)]
-#[diag(mir_dataflow_peek_argument_untracked)]
+#[diag("rustc_peek: argument untracked")]
 pub(crate) struct PeekArgumentUntracked {
     #[primary_span]
     pub span: Span,
diff --git a/compiler/rustc_mir_dataflow/src/lib.rs b/compiler/rustc_mir_dataflow/src/lib.rs
index 485925e7b50cd..5f1cf12501522 100644
--- a/compiler/rustc_mir_dataflow/src/lib.rs
+++ b/compiler/rustc_mir_dataflow/src/lib.rs
@@ -34,8 +34,6 @@ pub mod rustc_peek;
 mod un_derefer;
 pub mod value_analysis;
 
-rustc_fluent_macro::fluent_messages! { "../messages.ftl" }
-
 pub struct MoveDataTypingEnv<'tcx> {
     pub move_data: MoveData<'tcx>,
     pub typing_env: ty::TypingEnv<'tcx>,