Remove redundant OS check before running az

Author: ahmelsayed

src/Azure.Functions.Cli/Actions/AzureActions/BaseAzureAction.cs

@@ -66,15 +66,7 @@ public async Task Initialize()
 
         private async Task<string> GetAccessToken()
         {
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ||
-                RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-            {
-                return await AzureCliGetToken();
-            }
-            else
-            {
-                return await AzureCliGetToken();
-            }
+            return await AzureCliGetToken();
         }
 
         private async Task<string> AzureCliGetToken()