Remove Deprecated Azure CI Step (#26384)

Author: WillAyd

ci/azure/windows.yml

@@ -17,14 +17,10 @@ jobs:
         CONDA_PY: "37"
 
   steps:
-    - task: CondaEnvironment@1
-      inputs:
-        updateConda: no
-        packageSpecs: ''
-
-    - script: |
-        ci\\incremental\\setup_conda_environment.cmd
-      displayName: 'Before Install'
+    - powershell: Write-Host "##vso[task.prependpath]$env:CONDA\Scripts"
+      displayName: Add conda to PATH
+    - script: conda env create --file ci\\deps\\azure-windows-$(CONDA_PY).yaml
+      displayName: Create anaconda environment
     - script: |
         call activate pandas-dev
         ci\\incremental\\build.cmd