remove unused azure file, rathe the nix version azure.sh is fine to reuse

Author: yugangw-msft

tools/CLU/BuildAndInstallClu.bat

@@ -45,4 +45,4 @@ copy /Y %root%\drop\clurun\win7-x64\msclu.cfg %root%\drop\clurun\ubuntu.14.04-x6
 copy /Y %azuresh% %root%\drop\clurun\ubuntu.14.04-x64
 
 REM, windows version also needs it for bash based testing
-copy /Y %azuresh% %root%\drop\clurun\win7-x64
+copy /Y %azuresh% %root%\drop\clurun\win7-x64\azure

tools/CLU/BuildDrop.ps1

@@ -17,7 +17,15 @@ if (!($dropLocation))
 if (!(Test-Path -Path $dropLocation -PathType Container))
 {
     mkdir "$dropLocation"
+}
+
+if (!(Test-Path -Path "$dropLocation\CommandRepo" -PathType Container))
+{
     mkdir "$dropLocation\CommandRepo"
+}
+
+if (!(Test-Path -Path "$dropLocation\clurun" -PathType Container))
+{
     mkdir "$dropLocation\clurun"
 }