By Sheila Dang (Reuters) – Twitter Inc investors blocked the re-election of an ally of Elon Musk to the board at an annual meeting on Wednesday that avoided the biggest question for the social media company: will it complete a $44 billion sale to the billionaire. Investors voted against Egon Durban, the co-head of private equity firm Silver Lake, who partnered with Tesla CEO Musk on his abandoned bid to take the electric carmaker private. The rebuke of Durban, who joined the board in 2020, comes as uncertainty looms over the deal. Musk tweeted on May 13 that the Twitter deal was “temporarily o…