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

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

wpimath/src/test/java/edu/wpi/first/wpilibj/math/StateSpaceUtilTest.java

@@ -27,7 +27,6 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
-@SuppressWarnings("PMD.TooManyMethods")
 public class StateSpaceUtilTest {
   @Test
   public void testCostArray() {