Remove unused mjOption.apirate.

PiperOrigin-RevId: 815633571
Change-Id: Ib98f3eb2df47f96fa1fe6e987a3a0cd23a9479f6

include/mujoco/experimental/usd/mjcPhysics/sceneAPI.h

@@ -170,31 +170,6 @@ class MjcPhysicsSceneAPI : public UsdAPISchemaBase {
   UsdAttribute CreateTimestepAttr(VtValue const& defaultValue = VtValue(),
                                   bool writeSparsely = false) const;
 
- public:
-  // --------------------------------------------------------------------- //
-  // APIRATE
-  // --------------------------------------------------------------------- //
-  /// Determines the rate (in Hz) at which an external API allows
-  /// the update function to be executed.
-  ///
-  /// | ||
-  /// | -- | -- |
-  /// | Declaration | `uniform double mjc:option:apirate = 100` |
-  /// | C++ Type | double |
-  /// | \ref Usd_Datatypes "Usd Type" | SdfValueTypeNames->Double |
-  /// | \ref SdfVariability "Variability" | SdfVariabilityUniform |
-  MJCPHYSICS_API
-  UsdAttribute GetApiRateAttr() const;
-
-  /// See GetApiRateAttr(), and also
-  /// \ref Usd_Create_Or_Get_Property for when to use Get vs Create.
-  /// If specified, author \p defaultValue as the attribute's default,
-  /// sparsely (when it makes sense to do so) if \p writeSparsely is \c true -
-  /// the default for \p writeSparsely is \c false.
-  MJCPHYSICS_API
-  UsdAttribute CreateApiRateAttr(VtValue const& defaultValue = VtValue(),
-                                 bool writeSparsely = false) const;
-
  public:
   // --------------------------------------------------------------------- //
   // IMPRATIO

include/mujoco/experimental/usd/mjcPhysics/tokens.h

@@ -455,10 +455,6 @@ struct MjcPhysicsTokensType {
   ///
   /// MjcPhysicsSceneAPI
   const TfToken mjcOptionActuatorgroupdisable;
-  /// \brief "mjc:option:apirate"
-  ///
-  /// MjcPhysicsSceneAPI
-  const TfToken mjcOptionApirate;
   /// \brief "mjc:option:ccd_iterations"
   ///
   /// MjcPhysicsSceneAPI

include/mujoco/mjmodel.h

@@ -469,7 +469,6 @@ typedef struct mjVFS_ mjVFS;
 struct mjOption_ {                // physics options
   // timing parameters
   mjtNum timestep;                // timestep
-  mjtNum apirate;                 // update rate for remote API (Hz)
 
   // solver parameters
   mjtNum impratio;                // ratio of friction-to-normal contact impedance

include/mujoco/mjxmacro.h

@@ -21,7 +21,6 @@
 // scalar fields of mjOption
 #define MJOPTION_FLOATS             \
     X( mjtNum,  timestep         )  \
-    X( mjtNum,  apirate          )  \
     X( mjtNum,  impratio         )  \
     X( mjtNum,  tolerance        )  \
     X( mjtNum,  ls_tolerance     )  \