Euro zone finance ministers will not set any deadline for Greece to come up with reforms to get more funding because such time limits lead to brinkmanship in negotiations, a senior euro zone official said on Tuesday. Greece, which is quickly running out of cash, pledged to its euro zone partners in February that by the end of April it would agree with creditors on a comprehensive list of reforms to get 7.2 billion euros remaining from its bailout. Euro zone officials had expected the list to be presented to euro zone finance ministers this Friday in Riga.