A California federal judge on Friday rejected a bid by Apple, Google, Intel, and Adobe Systems to exclude testimony from a plaintiffs’ expert and rule in their favor in a class action accusing them of agreeing not to poach one another’s employees. The suit was brought in 2011 by software engineers with the tech companies who allege the companies agreed to provide one another notice whenever one made an offer to another company’s employee, cap pay packages for prospective hires in order.