[wpilib] Remove LiveWindow (#7733)

This will be replaced by a different mechanism, but removing it eases
the initial implementation burden of a new Telemetry/Sendable framework.

epilogue-runtime/src/main/java/edu/wpi/first/epilogue/logging/LogBackedSendableBuilder.java

@@ -43,11 +43,6 @@ public class LogBackedSendableBuilder implements SendableBuilder {
     // ignore
   }
 
-  @Override
-  public void setSafeState(Runnable func) {
-    // ignore
-  }
-
   @Override
   public void addBooleanProperty(String key, BooleanSupplier getter, BooleanConsumer setter) {
     m_updates.add(() -> m_backend.log(key, getter.getAsBoolean()));