This happened

Judging by the way readers of the Daily Journal answered the last question of the day, the majority did not believe that Moscow Mayor Yuri Luzhkov would sign his resignation letter. And it turned out he was right: he didn’t sign it. But he was fired! Moreover, with such a devastating wording - “due to the loss of the president’s confidence.” The case, frankly speaking, is unprecedented. For now, Luzhkov’s duties are performed by his first deputy, Vladimir Resin. Unhappy Luzhkov learned about all this right at his workplace. President Dmitry Medvedev's press secretary Natalya Timakova told reporters that the president would not meet with the now former mayor. Later, Prime Minister Vladimir Putin's press secretary, Dmitry Peskov, said that his patron would also not meet with Luzhkov.

Previously, three regional heads were dismissed with this wording. The first was the governor of the no longer existing Koryak Autonomous Okrug, Vladimir Loginov - this was the first dismissal of a governor under Putin, in March 2005. Loginov suffered for disrupting preparations for winter. The second, in July 2006, became the governor of the Nenets Autonomous Okrug, Alexey Barinov, and by that time he had been arrested for almost two months as part of a criminal case about fraud committed by an organized group or on an especially large scale. Finally, the third was the governor of the Amur region, Leonid Korotkov, this was in 2007. Criminal cases were also brought against him in connection with corruption, but none were brought to trial. So the formulation is not unique, but the case with Luzhkov still remains unprecedented, if only because there are not only criminal cases, but even officially stated formal reasons for the loss of trust (do not consider the facts reported in television films as such).