windows: Remove reliance on explicit RUSTUP_HOME

Xanewok · Xanewok · commit 33904cd431df · 2019-08-02T14:45:39.000+02:00
diff --git a/ci/azure-install-rust.yml b/ci/azure-install-rust.yml
@@ -14,7 +14,6 @@ steps:
 
   # Windows.
   - script: |
-      set RUSTUP_HOME=%USERPROFILE%\.rustup
       curl -sSf -o rustup-init.exe https://win.rustup.rs
       rustup-init.exe -y --default-toolchain none
       set PATH=%PATH%;%USERPROFILE%\.cargo\bin
