Remove all jemalloc-related content

This commit removes all jemalloc related submodules, configuration, etc,
from the bootstrap, from the standard library, and from the compiler.
This will be followed up with a change to use jemalloc specifically as
part of rustc on blessed platforms.

3 files changed, 4 insertions, 18 deletions

diff --git a/src/libstd/Cargo.toml b/src/libstd/Cargo.toml
index cd1e3438fc3..0f22459b343 100644
--- a/src/libstd/Cargo.toml
+++ b/src/libstd/Cargo.toml
@@ -14,7 +14,6 @@ crate-type = ["dylib", "rlib"]
 
 [dependencies]
 alloc = { path = "../liballoc" }
-alloc_jemalloc = { path = "../liballoc_jemalloc", optional = true }
 alloc_system = { path = "../liballoc_system" }
 panic_unwind = { path = "../libpanic_unwind", optional = true }
 panic_abort = { path = "../libpanic_abort" }
@@ -43,9 +42,6 @@ build_helper = { path = "../build_helper" }
 
 [features]
 backtrace = []
-debug-jemalloc = ["alloc_jemalloc/debug"]
-jemalloc = ["alloc_jemalloc"]
-force_alloc_system = []
 panic-unwind = ["panic_unwind"]
 profiler = ["profiler_builtins"]
 
diff --git a/src/libstd/alloc.rs b/src/libstd/alloc.rs
index 31fc9ed3f77..1ff342fa7a7 100644
--- a/src/libstd/alloc.rs
+++ b/src/libstd/alloc.rs
@@ -13,13 +13,10 @@
 //! In a given program, the standard library has one “global” memory allocator
 //! that is used for example by `Box<T>` and `Vec<T>`.
 //!
-//! Currently the default global allocator is unspecified.
-//! The compiler may link to a version of [jemalloc] on some platforms,
-//! but this is not guaranteed.
-//! Libraries, however, like `cdylib`s and `staticlib`s are guaranteed
-//! to use the [`System`] by default.
+//! Currently the default global allocator is unspecified. Libraries, however,
+//! like `cdylib`s and `staticlib`s are guaranteed to use the [`System`] by
+//! default.
 //!
-//! [jemalloc]: https://github.com/jemalloc/jemalloc
 //! [`System`]: struct.System.html
 //!
 //! # The `#[global_allocator]` attribute
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index ab3e97d1d92..b55d12e4c8d 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -313,14 +313,7 @@
 
 #![default_lib_allocator]
 
-// Always use alloc_system during stage0 since we don't know if the alloc_*
-// crate the stage0 compiler will pick by default is enabled (e.g.
-// if the user has disabled jemalloc in `./configure`).
-// `force_alloc_system` is *only* intended as a workaround for local rebuilds
-// with a rustc without jemalloc.
-// FIXME(#44236) shouldn't need MSVC logic
-#[cfg(all(not(target_env = "msvc"),
-          any(all(stage0, not(test)), feature = "force_alloc_system")))]
+#[cfg(stage0)]
 #[global_allocator]
 static ALLOC: alloc_system::System = alloc_system::System;