coverage: Revert "unused local file IDs" due to empty function names

This reverts commit 3b22c21dd8c30f499051fe7a758ca0e5d81eb638, reversing
changes made to 5f292eea6d63abbd26f1e6e00a0b8cf21d828d7d.

3 files changed, 0 insertions, 11 deletions

diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index 144aeb5c369..60e1b465ba9 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -195,11 +195,6 @@ pub struct CoverageOptions {
     /// regression tests for #133606, because we don't have an easy way to
     /// reproduce it from actual source code.
     pub discard_all_spans_in_codegen: bool,
-
-    /// `-Zcoverage-options=inject-unused-local-file`: During codegen, add an
-    /// extra dummy entry to each function's local file table, to exercise the
-    /// code that checks for local file IDs with no mapping regions.
-    pub inject_unused_local_file: bool,
 }
 
 /// Controls whether branch coverage or MC/DC coverage is enabled.
diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs
index 3d9fdcbc7b1..5b4068740a1 100644
--- a/compiler/rustc_session/src/options.rs
+++ b/compiler/rustc_session/src/options.rs
@@ -1413,7 +1413,6 @@ pub mod parse {
                 "mcdc" => slot.level = CoverageLevel::Mcdc,
                 "no-mir-spans" => slot.no_mir_spans = true,
                 "discard-all-spans-in-codegen" => slot.discard_all_spans_in_codegen = true,
-                "inject-unused-local-file" => slot.inject_unused_local_file = true,
                 _ => return false,
             }
         }
diff --git a/compiler/rustc_session/src/session.rs b/compiler/rustc_session/src/session.rs
index 34ac37d6378..010ae42c280 100644
--- a/compiler/rustc_session/src/session.rs
+++ b/compiler/rustc_session/src/session.rs
@@ -371,11 +371,6 @@ impl Session {
         self.opts.unstable_opts.coverage_options.discard_all_spans_in_codegen
     }
 
-    /// True if testing flag `-Zcoverage-options=inject-unused-local-file` was passed.
-    pub fn coverage_inject_unused_local_file(&self) -> bool {
-        self.opts.unstable_opts.coverage_options.inject_unused_local_file
-    }
-
     pub fn is_sanitizer_cfi_enabled(&self) -> bool {
         self.opts.unstable_opts.sanitizer.contains(SanitizerSet::CFI)
     }