Revert "Modernizing Winforms images in core (Redo dotnet#678) (dotnet…

…#886)"

This reverts commit 840b1e3.

src/Common/src/DpiHelper.cs

@@ -287,17 +287,6 @@ public static Bitmap CreateResizedBitmap(Bitmap logicalImage, Size targetImageSi
             return ScaleBitmapToSize(logicalImage, targetImageSize);
         }
 
-        /// <summary>
-        /// Creating bitmap from Icon resource
-        /// </summary>
-        public static Bitmap GetBitmapFromIcon(Type t, string name)
-        {
-            Icon b = new Icon(t, name);
-            Bitmap bitmap = b.ToBitmap();
-            b.Dispose();
-            return bitmap;
-        }
-
         /// <summary>
         /// Create a new bitmap scaled for the device units.
         /// When displayed on the device, the scaled image will have same size as the original image would have when displayed at 96dpi.