diff --git a/src/librustc/session/config.rs b/src/librustc/session/config.rs
index cc8e8c7c31c2..2c8f021c6a52 100644
--- a/src/librustc/session/config.rs
+++ b/src/librustc/session/config.rs
@@ -1304,8 +1304,6 @@ fn parse_cross_lang_lto(slot: &mut CrossLangLto, v: Option<&str>) -> bool {
         "enable polonius-based borrow-checker"),
     codegen_time_graph: bool = (false, parse_bool, [UNTRACKED],
         "generate a graphical HTML report of time spent in codegen and LLVM"),
-    trans_time_graph: bool = (false, parse_bool, [UNTRACKED],
-        "generate a graphical HTML report of time spent in trans and LLVM"),
     thinlto: Option<bool> = (None, parse_opt_bool, [TRACKED],
         "enable ThinLTO when possible"),
     inline_in_all_cgus: Option<bool> = (None, parse_opt_bool, [TRACKED],