TMC MLA Firhad Hakim on Wednesday resigned as Kolkata mayor after after party supremo Mamata Banerjee accepted his request to step down, senior party leader Kunal Ghosh said, news agency PTI reported.Firhad Hakim resigns as Mayor. (Saikat paul)Hakim had earlier sought permission from the TMC chief to resign from the post, citing difficulties in functioning after the BJP came to power in West Bengal, according to PTI. However, an official confirmation of the resignation is yet to be received."At that time, he was asked not to resign. However, he again requested Mamata Banerjee today to allow him to step down, following which she agreed," Ghosh told reporters.The development comes at a time when TMC is witnessing its worst