March 12 (Reuters) - The Texas power regulator on Friday voted to remove about $1 billion in service fees levied on grid users but took no action on petitions asking it to cut high power prices during a mid-February cold snap. The fees involved payment to power generators for services not provided during the mid-February cold snap, according to the state’s market adviser. The Texas Public Utility Commission also ordered the state’s grid operator to extend its deadline for accepting freeze-related payment disputes to 6 months from 10 days. (Reporting by Gary McWilliams)