docs(equations): removed old docs

src/include/serif/equations/central_density.hpp

@@ -20,8 +20,6 @@
 #include "serif/utils/error/errors.hpp"
 
 namespace serif::equations {
-    /// Prescribe central density through the continuous enthalpy: h(0) - h_EOS(rho_c) = 0.
-
     /**
      * @brief Prescribe central density through the continuous enthalpy: \f$h(0) - h_{EOS}(\rho_c) = 0\f$. Generally this is not needed; however, in the particular
      * case of an n=3 polytrope with no rotation the central density becomes ill-defined and must be prescribed to avoid a singularity in the solution. Note that

src/include/serif/equations/displacement_force.hpp

@@ -57,8 +57,6 @@ namespace serif::equations {
 
         static constexpr std::string_view name = "displacement force"; ///< Compile time name for the mechanical balance equation, used for debugging and logging.
 
-        /// Pressure carries its EOS; rotation prescribes an axis and reads angular speed from the state.
-
         /**
          * @brief Construct a mechanical balance equation.
          *