rustc: Move jemalloc from rustc_driver to rustc

This commit moves jemalloc to just the rustc binary rather than the
rustc_driver shared library, enusring that it's only used for binaries
that opt-in to it like rustc rather than other binaries using
librustc_driver like rustdoc/rls/etc. This will hopefully address #56980

1 files changed, 0 insertions, 8 deletions

diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs
index 41c9b22afe0..fcf7331b8ab 100644
--- a/src/librustc_driver/lib.rs
+++ b/src/librustc_driver/lib.rs
@@ -64,14 +64,6 @@ extern crate syntax;
 extern crate syntax_ext;
 extern crate syntax_pos;
 
-// Note that the linkage here should be all that we need, on Linux we're not
-// prefixing the symbols here so this should naturally override our default
-// allocator. On OSX it should override via the zone allocator. We shouldn't
-// enable this by default on other platforms, so other platforms aren't handled
-// here yet.
-#[cfg(feature = "jemalloc-sys")]
-extern crate jemalloc_sys;
-
 use driver::CompileController;
 use pretty::{PpMode, UserIdentifiedItem};