Make template package uninstallation detection report errors properly

test/Templates.Test/Helpers/TemplatePackageInstaller.cs

@@ -74,8 +74,7 @@ namespace Templates.Test.Helpers
             // Verify we really did remove the previous templates
             var tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("D"));
             Directory.CreateDirectory(tempDir);
-            try
-            {
+
             var proc = ProcessEx.Run(
                 output,
                 tempDir,
@@ -86,12 +85,9 @@ namespace Templates.Test.Helpers
             {
                 throw new InvalidOperationException($"Failed to uninstall previous templates. The template '{templateName}' could still be found.");
             }
-            }
-            finally
-            {
+
             Directory.Delete(tempDir);
         }
-        }
 
         private static string FindAncestorDirectoryContaining(string filename)
         {