Remove redundant isCanceled checks in SaveablesList and SaveableHelper

This addresses the proposal by ptziegler in PR #3542 to split the removal of isCanceled checks.

Author: vogella

bundles/org.eclipse.ui.workbench/eclipseui/org/eclipse/ui/internal/SaveableHelper.java

@@ -193,9 +193,6 @@ private static boolean saveModels(ISaveablesSource modelSource, final IWorkbench
 						continue;
 					}
 					doSaveModel(model, subMonitor.split(1), window, confirm);
-					if (subMonitor.isCanceled()) {
-						break;
-					}
 				}
 			} finally {
 				monitorWrap.done();

bundles/org.eclipse.ui.workbench/eclipseui/org/eclipse/ui/internal/SaveablesList.java

@@ -796,9 +796,6 @@ public boolean saveModels(final List<Saveable> finalModels, final IShellProvider
 					continue;
 				}
 				SaveableHelper.doSaveModel(model, subMonitor.split(1), shellProvider, blockUntilSaved);
-				if (subMonitor.isCanceled()) {
-					break;
-				}
 			}
 			monitorWrap.done();
 		};