Bulgarian Prime Minister Nikolai Denkov resigned as planned after nine months at the head of a pro-Western government, opening the door for his coalition partner to lead the country. Denkov’s letter of resignation was submitted to parliament on Tuesday, the government in Sofia said. It was not immediately clear when parliament would vote on the resignation of Denkov and the government he led. “The government will continue its business … until a new government is elected,” said Denkov in a speech on Tuesday evening. The move clears the way for former EU commissioner and former deputy prime mi…