remove unused patch

0001-Allow-installing-rustfmt-without-config.extended.patch

@@ -1,27 +0,0 @@
-From 86f7d8939d19d42e21d4e794e648f0aef14eeec9 Mon Sep 17 00:00:00 2001
-From: Josh Stone <jistone@redhat.com>
-Date: Thu, 22 Mar 2018 18:31:32 -0700
-Subject: [PATCH] Allow installing rustfmt without config.extended
-
-This assertion was preventing `./x.py install rustfmt` if attempted
-without an "extended" build configuration, but it actually builds and
-installs just fine.
----
- src/bootstrap/dist.rs | 1 -
- 1 file changed, 1 deletion(-)
-
-diff --git a/src/bootstrap/dist.rs b/src/bootstrap/dist.rs
-index eca06eac7f30..142296b20958 100644
---- a/src/bootstrap/dist.rs
-+++ b/src/bootstrap/dist.rs
-@@ -1186,7 +1186,6 @@ impl Step for Rustfmt {
-         let build = builder.build;
-         let stage = self.stage;
-         let target = self.target;
--        assert!(build.config.extended);
- 
-         println!("Dist Rustfmt stage{} ({})", stage, target);
-         let src = build.src.join("src/tools/rustfmt");
--- 
-2.14.3
-