Delhi Assembly Speaker Ram Niwas Goel on Thursday informed Aam Aadmi Party national convenor Arvind Kejriwal in a letter about his decision to retire from electoral politics, citing his advancing age. Delhi Vidhan Sabha speaker Ram Niwas Goel, with current Delhi chief minister Atishi and AAP national convenor Arvind Kejriwal. Responding to the letter, AAP supremo and former Delhi chief …