Revert adding asserts in tests

Since the tests run across different printer hardware they can't take a
dependency on the default printer settings. Revert adding asserts in
these cases so the tests still verify that the properties don't throw.

src/libraries/System.Drawing.Common/tests/Printing/PrinterSettingsTests.cs

@@ -49,15 +49,13 @@ public void CanDuplex_ReturnsExpected()
         {
             var printerSettings = new PrinterSettings();
             bool canDuplex = printerSettings.CanDuplex;
-            Assert.True(canDuplex);
         }
 
         [ConditionalFact(Helpers.IsDrawingSupported)]
         public void Copies_Default_ReturnsExpected()
         {
             var printerSettings = new PrinterSettings();
             int copies = printerSettings.Copies;
-            Assert.Equal(1, copies);
         }
 
         [ConditionalTheory(Helpers.IsDrawingSupported)]
@@ -87,7 +85,6 @@ public void Collate_Default_ReturnsExpected()
         {
             var printerSettings = new PrinterSettings();
             bool collate = printerSettings.Collate;
-            Assert.True(collate);
         }
 
         [ConditionalFact(Helpers.IsDrawingSupported)]
@@ -400,7 +397,6 @@ public void IsDirectPrintingSupported_ImageFormatSupported_ReturnsExpected(Image
         {
             var printerSettings = new PrinterSettings();
             bool supported = printerSettings.IsDirectPrintingSupported(imageFormat);
-            Assert.True(supported);
         }
 
         public static IEnumerable<object[]> IsDirectPrintingSupported_ImageFormatNotSupported_TestData()