Removed the unused constant 'const_max_u_change'.

src/const.h

@@ -20,9 +20,6 @@
 #ifndef SWIFT_CONST_H
 #define SWIFT_CONST_H
 
-/* Time integration constants. */
-#define const_max_u_change 0.1f
-
 /* I/O Constant; this determines the relative tolerance between the value of
  * redshift read from the snapshot, and the value from the parameter file. This
  * current value asserts that they must match within 0.1%. */

src/hydro/AnarchyPU/hydro_io.h

@@ -229,10 +229,6 @@ INLINE static void hydro_write_flavour(hid_t h_grpsph) {
                        "Simple treatment as in Price (2008)");
   io_write_attribute_s(h_grpsph, "Viscosity Model",
                        "Simplified version of Cullen & Denhen (2011)");
-
-  /* Time integration properties */
-  io_write_attribute_f(h_grpsph, "Maximal Delta u change over dt",
-                       const_max_u_change);
 }
 
 /**

src/hydro/Default/hydro_io.h

@@ -229,10 +229,6 @@ INLINE static void hydro_write_flavour(hid_t h_grpsph) {
                        "Simple treatment as in Price (2017)");
   io_write_attribute_s(h_grpsph, "Viscosity Model",
                        "Simplified version of Cullen & Denhen (2011)");
-
-  /* Time integration properties */
-  io_write_attribute_f(h_grpsph, "Maximal Delta u change over dt",
-                       const_max_u_change);
 }
 
 /**

src/hydro/Minimal/hydro_io.h

@@ -211,10 +211,6 @@ INLINE static void hydro_write_flavour(hid_t h_grpsph) {
   io_write_attribute_s(h_grpsph, "Thermal Conductivity Model", "No treatment");
   io_write_attribute_s(h_grpsph, "Viscosity Model",
                        "Minimal treatment as in Monaghan (1992)");
-
-  /* Time integration properties */
-  io_write_attribute_f(h_grpsph, "Maximal Delta u change over dt",
-                       const_max_u_change);
 }
 
 /**

src/hydro/Planetary/hydro_io.h

@@ -214,10 +214,6 @@ INLINE static void hydro_write_flavour(hid_t h_grpsph) {
       h_grpsph, "Viscosity Model",
       "as in Springel (2005), i.e. Monaghan (1992) with Balsara (1995) switch");
 #endif
-
-  /* Time integration properties */
-  io_write_attribute_f(h_grpsph, "Maximal Delta u change over dt",
-                       const_max_u_change);
 }
 
 /**

src/hydro/PressureEnergy/hydro_io.h

@@ -210,10 +210,6 @@ INLINE static void hydro_write_flavour(hid_t h_grpsph) {
   io_write_attribute_s(h_grpsph, "Thermal Conductivity Model", "No treatment");
   io_write_attribute_s(h_grpsph, "Viscosity Model",
                        "Minimal treatment as in Monaghan (1992)");
-
-  /* Time integration properties */
-  io_write_attribute_f(h_grpsph, "Maximal Delta u change over dt",
-                       const_max_u_change);
 }
 
 /**

src/hydro/PressureEnergyMorrisMonaghanAV/hydro_io.h

@@ -215,10 +215,6 @@ INLINE static void hydro_write_flavour(hid_t h_grpsph) {
   io_write_attribute_s(h_grpsph, "Thermal Conductivity Model", "No treatment");
   io_write_attribute_s(h_grpsph, "Viscosity Model",
                        "Variable viscosity as in Morris and Monaghan (1997)");
-
-  /* Time integration properties */
-  io_write_attribute_f(h_grpsph, "Maximal Delta u change over dt",
-                       const_max_u_change);
 }
 
 /**

src/hydro/PressureEntropy/hydro_io.h

@@ -217,10 +217,6 @@ INLINE static void hydro_write_flavour(hid_t h_grpsph) {
   io_write_attribute_s(
       h_grpsph, "Viscosity Model",
       "as in Springel (2005), i.e. Monaghan (1992) with Balsara (1995) switch");
-
-  /* Time integration properties */
-  io_write_attribute_f(h_grpsph, "Maximal Delta u change over dt",
-                       const_max_u_change);
 }
 
 /**

src/hydro/SPHENIX/hydro_io.h

@@ -222,10 +222,6 @@ INLINE static void hydro_write_flavour(hid_t h_grpsph) {
                        "Simple treatment as in Price (2008)");
   io_write_attribute_s(h_grpsph, "Viscosity Model",
                        "Simplified version of Cullen & Denhen (2011)");
-
-  /* Time integration properties */
-  io_write_attribute_f(h_grpsph, "Maximal Delta u change over dt",
-                       const_max_u_change);
 }
 
 /**