Simplifying dealing with Colors in tests

There is no need to go through RGB, cache and etc. complications.

Author: akurtakov

tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug138265_SystemMemoryUsage.java

@@ -18,7 +18,6 @@
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Color;
-import org.eclipse.swt.graphics.RGB;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
@@ -81,7 +80,7 @@ public void widgetSelected(SelectionEvent arg0) {
 }
 });
 
-color = new Color(new RGB(31,150,192));
+color = new Color(31,150,192);
 
 }
 

tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug558222_BlackIcon.java

@@ -44,7 +44,7 @@ public static void main(String[] args) {
 		 */
 		Color border = display.getSystemColor(SWT.COLOR_WIDGET_DARK_SHADOW);
 		Color background = display.getSystemColor(SWT.COLOR_LIST_BACKGROUND);
-		Color backgroundHot = new Color(new RGB(252, 160, 160));
+		Color backgroundHot = new Color(252, 160, 160);
 		Color transparent = display.getSystemColor(SWT.COLOR_MAGENTA);
 
 		PaletteData palette = new PaletteData(new RGB[] { transparent.getRGB(), border.getRGB(), background.getRGB(), backgroundHot.getRGB() });