Clean up Java warning suppressions (#4433)

Checkstyle naming conventions were changed to allow most of what's in
wpimath. Naming rules were disabled completely in wpimath since almost
all suppressions are for math notation.

wpimath/src/main/java/edu/wpi/first/math/Pair.java

@@ -21,7 +21,6 @@ public class Pair<A, B> {
     return m_second;
   }
 
-  @SuppressWarnings("ParameterName")
   public static <A, B> Pair<A, B> of(A a, B b) {
     return new Pair<>(a, b);
   }