Backed out changeset d8d8af44ae92 (bug 1531655) for artifact build bustage. CLOSED TREE

toolkit/moz.configure

@@ -705,14 +705,11 @@ set_config('MOZ_ENABLE_WEBRENDER', webrender.enable)
 option('--enable-rust-simd', env='MOZ_RUST_SIMD',
        help='Enable explicit SIMD in Rust code.')
 
-@depends('--enable-rust-simd', target, rustc_info)
-def rust_simd(value, target, rustc_info):
+@depends('--enable-rust-simd', target)
+def rust_simd(value, target):
     # As of 2018-06-05, the simd crate only works on aarch64,
     # armv7, x86 and x86_64.
     if target.cpu in ('aarch64', 'arm', 'x86', 'x86_64') and value:
-        if rustc_info.version >= Version('1.33.0'):
-            die('--enable-rust-simd does not work with Rust 1.33 or later. '
-                'See https://bugzilla.mozilla.org/show_bug.cgi?id=1521249 .')
         return True
 
 set_config('MOZ_RUST_SIMD', rust_simd)