[wpimath] Deprecate RamseteController (#6494)

LTVUnicycleController is a drop-in replacement with better tuning knobs.

The RamseteCommand examples were removed instead of retrofitted with
LTVUnicycleController because we're planning on removing the command
controller classes anyway, so it would be wasted effort. The
SimpleDifferentialDriveSimulation example shows direct
LTVUnicycleController usage.

wpilibcExamples/src/main/cpp/examples/examples.json

@@ -502,24 +502,6 @@
     "gradlebase": "cpp",
     "commandversion": 2
   },
-  {
-    "name": "RamseteCommand",
-    "description": "Follow a pre-generated trajectory with a differential drive using RamseteCommand.",
-    "tags": [
-      "Differential Drive",
-      "Command-based",
-      "Ramsete",
-      "Trajectory",
-      "Path Following",
-      "Odometry",
-      "Encoder",
-      "Gyro",
-      "XboxController"
-    ],
-    "foldername": "RamseteCommand",
-    "gradlebase": "cpp",
-    "commandversion": 2
-  },
   {
     "name": "Arcade Drive Xbox Controller",
     "description": "Control a differential drive with split-stick arcade drive in teleop.",
@@ -671,23 +653,6 @@
     "gradlebase": "cpp",
     "commandversion": 2
   },
-  {
-    "name": "RamseteController",
-    "description": "Follow a pre-generated trajectory with a differential drive using RamseteController.",
-    "tags": [
-      "Basic Robot",
-      "Differential Drive",
-      "Ramsete",
-      "PID",
-      "Odometry",
-      "Path Following",
-      "Trajectory",
-      "XboxController"
-    ],
-    "foldername": "RamseteController",
-    "gradlebase": "cpp",
-    "commandversion": 2
-  },
   {
     "name": "RomiReference",
     "description": "An example command-based robot program that can be used with the Romi reference robot design.",
@@ -887,20 +852,6 @@
     "gradlebase": "cpp",
     "commandversion": 2
   },
-  {
-    "name": "StateSpaceDriveSimulation",
-    "description": "Simulate a differential drivetrain and follow trajectories with RamseteCommand (command-based).",
-    "tags": [
-      "Command-based",
-      "Differential Drive",
-      "State-Space",
-      "XboxController",
-      "Simulation"
-    ],
-    "foldername": "StateSpaceDifferentialDriveSimulation",
-    "gradlebase": "cpp",
-    "commandversion": 2
-  },
   {
     "name": "SwerveDrivePoseEstimator",
     "description": "Combine swerve-drive odometry with vision data using SwerveDrivePoseEstimator.",