It may be necessary to cancel the parametric equation in the second volume of the national college entrance examination in 2022, but it is not necessary. The requirement of the parametric equation topic is to determine the properties of the curve and solve the equation according to the given parametric equation. Whether to cancel the parameters depends on the requirements and conditions of the topic.

In some cases, in order to better understand and analyze the properties of curves, parameter elimination is a useful method. By eliminating parameters, we can transform the parametric equation into an equation with ordinary variables, which makes calculation and analysis more convenient.

However, in other cases, parameter elimination is unnecessary or infeasible. Some curves described by parametric equations may not be simplified to equations with ordinary variables, so it is necessary to calculate and analyze them directly with parametric equations.

Therefore, in the process of solving the problem, please judge whether it is necessary to cancel the parameters according to the specific topic requirements and conditions. If there are no clear requirements or applicable conditions in the topic, judge it according to your understanding of the parametric equation.