Let us assume that the cost of producing 1 unit of electricity is Rs 100. And, the subsidised price offered by government is Rs 60. Now, this implies that government is incurring a loss of Rs 40 ( i.e 100 - 60) by selling each unit of electricity.
If the government will provide electricity without subsidy, then it will sell electricity at a price of Rs 100 per unit. This means there will be no loss to the government in such a scenario.