[build] Globally Exclude PMD.TooManyMethods (#2793)

This was not a useful check, as every time we hit it, we simply excluded it.

wpilibj/src/test/java/edu/wpi/first/wpilibj/TimedRobotTest.java

@@ -20,7 +20,6 @@ import edu.wpi.first.wpilibj.simulation.SimHooks;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 class TimedRobotTest {
-  @SuppressWarnings("PMD.TooManyMethods")
   class MockRobot extends TimedRobot {
     public final AtomicInteger m_robotInitCount = new AtomicInteger(0);
     public final AtomicInteger m_simulationInitCount = new AtomicInteger(0);