The Board of Examiners for Nursing on Wednesday disciplined 10 nurses, including revoking the licenses of three nurses and imposing fines on two others. The board revoked the licensed practical nurse license of Laurie Davidson of Bolton after finding that she failed to properly document medical records while working in 2015 as a nurse at Walnut Hill Care Center in New Britain. Davidson has an 18-year history of substance abuse and was suspected of taking “excessive” amounts of drugs from Walnut Hill, the board’s memorandum of decision said. The board revoked the registered nurse license of Amanda Alarcon of Shelton for failing to attend therapy sessions or submit to drug tests, its memorandum of decision said. Those were violations of a four-year probation that the board imposed in 2017 because she had abused heroin between 2011 and 2014, state records show.