Auto merge of #61213 - pietroalbini:fix-azure-multiple-checkouts, r=alexcrichton

azure: fix multiple checkouts on azure

We were checking out the rustc repo multiple times on auto macOS, and
that was causing an error on the Azure side since multiple checkouts are
apparently not supported. This removes the extra checkout.

r? @alexcrichton
fixes #61170

.azure-pipelines/auto.yml

@@ -11,6 +11,7 @@ variables:
 
 jobs:
 - job: Linux
+  timeoutInMinutes: 600
   pool:
     vmImage: ubuntu-16.04
   steps:
@@ -150,11 +151,10 @@ jobs:
         IMAGE: mingw-check
 
 - job: macOS
+  timeoutInMinutes: 600
   pool:
     vmImage: macos-10.13
   steps:
-  - checkout: self
-    fetchDepth: 2
   - template: steps/run.yml
   strategy:
     matrix:
@@ -214,6 +214,7 @@ jobs:
 
 
 - job: Windows
+  timeoutInMinutes: 600
   pool:
     vmImage: 'vs2017-win2016'
   steps: