Revert "Add the name of the equation of state to the snapshot meta-data."

This reverts commit f99fc622.

src/equation_of_state.h

@@ -32,13 +32,10 @@
 /* Import the right functions */
 #if defined(EOS_IDEAL_GAS)
 #include "./equation_of_state/ideal_gas/equation_of_state.h"
-#define EOS_NAME "Ideal gas"
 #elif defined(EOS_ISOTHERMAL_GAS)
 #include "./equation_of_state/isothermal/equation_of_state.h"
-#define EOS_NAME "Isothermal gas"
 #elif defined(EOS_PLANETARY)
 #include "./equation_of_state/planetary/equation_of_state.h"
-#define EOS_NAME "Planetary (variable) gas"
 #else
 #error "Invalid choice of equation of state"
 #endif

src/hydro_properties.c

@@ -281,7 +281,6 @@ void hydro_props_print_snapshot(hid_t h_grpsph, const struct hydro_props *p) {
 
   io_write_attribute_i(h_grpsph, "Dimension", (int)hydro_dimension);
   io_write_attribute_f(h_grpsph, "Adiabatic index", hydro_gamma);
-  io_write_attribute_s(h_grpsph, "Equation of state", EOS_NAME);
   io_write_attribute_s(h_grpsph, "Scheme", SPH_IMPLEMENTATION);
   io_write_attribute_s(h_grpsph, "Kernel function", kernel_name);
   io_write_attribute_f(h_grpsph, "Kernel target N_ngb", p->target_neighbours);