Remove pointless #imports from .m and .h files

This was done with a brute-force approach, ensuring no additional
warnings from GCC 4.9 under x86_64.

OpenChange/MAPIStoreCalendarEmbeddedMessage.m

@@ -22,22 +22,13 @@
 
 #include <talloc.h>
 
-#import <Foundation/NSCalendarDate.h>
-#import <Foundation/NSDictionary.h>
 
 #import <NGObjWeb/WOContext+SoObjects.h>
 
-#import <SOGo/SOGoUser.h>
 #import "iCalEvent+MAPIStore.h"
 
-#import "MAPIStoreAppointmentWrapper.h"
-#import "MAPIStoreCalendarAttachment.h"
-#import "MAPIStoreContext.h"
-#import "MAPIStoreUserContext.h"
-#import "MAPIStoreTypes.h"
 #import "NSObject+MAPIStore.h"
 
-#import "MAPIStoreCalendarEmbeddedMessage.h"
 
 #include <mapistore/mapistore_errors.h>