Auto merge of #6709 - rust-lang:flip1995-patch-1, r=matthiaskrgr

Remove rustfmt from rust-toolchain file

We use latest nightly rustfmt in our tests anyway

r? `@matthiaskrgr`

changelog: none

Author: bors

rust-toolchain

@@ -1,3 +1,3 @@
 [toolchain]
 channel = "nightly-2021-02-03"
-components = ["llvm-tools-preview", "rustc-dev", "rust-src", "rustfmt"]
+components = ["llvm-tools-preview", "rustc-dev", "rust-src"]