Chief Minister Mamata Banerjee on Thursday wrote to Prime Minister Narendra Modi urging him to intervene to remove the colour branding conditionalities for health and wellness centres and release National Health Mission (NHM) funds to Bengal. Withholding of funds by the Centre will deprive the poor of their health benefits, she said in her two-page letter to the prime minister. "It is most unfortunate that very recently, I am informed that the U…