Revert "Bug 575398 - CTabFolderRenderer: fix drawing the cross on Win32"

This reverts commit f902ddb.
This commit triggered drawing issues with GDI+ on win32 causing tabs to
disappear, see Bug 575873.

Change-Id: I7ba84cacccb77d00098bfc26553cc006b23c474a
Signed-off-by: Rolf Theunissen <[email protected]>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.swt/+/185827
Tested-by: Andrey Loskutov <[email protected]>
Reviewed-by: Andrey Loskutov <[email protected]>

Author: rolfth

bundles/org.eclipse.swt/Eclipse SWT Custom Widgets/common/org/eclipse/swt/custom/CTabFolderRenderer.java

@@ -60,8 +60,6 @@ public class CTabFolderRenderer {
 
 	private Font chevronFont = null;
 
-	private boolean antiAlias = true;
-
 	//TOP_LEFT_CORNER_HILITE is laid out in reverse (ie. top to bottom)
 	//so can fade in same direction as right swoop curve
 	static final int[] TOP_LEFT_CORNER_HILITE = new int[] {5,2, 4,2, 3,3, 2,4, 2,5, 1,6};
@@ -873,13 +871,6 @@ void drawClose(GC gc, Rectangle closeRect, int closeImageState) {
 		y += parent.onBottom ? -1 : 1;
 		int originalLineWidth = gc.getLineWidth();
 		Color originalForeground = gc.getForeground();
-		if (antiAlias)  {
-			try  {
-				gc.setAntialias(SWT.ON);
-			} catch (SWTException e)  {
-				antiAlias = false;
-			}
-		}
 		switch (closeImageState & (SWT.HOT | SWT.SELECTED | SWT.BACKGROUND)) {
 			case SWT.NONE: {
 				drawCloseLines(gc, x, y , lineLength, false);