To delete the “Send to SkyDrive Pro” one drive (onedrive or sky drive) menu entry from the context menu, do the following:
Open Regedit and navigate to:
HKEY_CLASSES_ROOT\AllFilesystemObjects\shell\
then delete this subfolder:
SPFS.ContextMenu
HKEY_CLASSES_ROOT\AllFilesystemObjects\shell\SPFS.ContextMenu