diff --git a/.travis.yml b/.travis.yml
index d0595e1..8af4be3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -75,7 +75,6 @@ matrix:
         # Check rustfmt
         - name: "rustfmt check"
           rust: stable
-          env: RUSTUP_TOOLCHAIN="stable"
           install: rustup component add rustfmt
           script: cargo fmt -- --check
 
diff --git a/rust-toolchain b/rust-toolchain
deleted file mode 100644
index 9bea09d..0000000
--- a/rust-toolchain
+++ /dev/null
@@ -1 +0,0 @@
-nightly-2019-09-09