javac should not warn about imports of deprecated classes

---%<---
$ cat */*.java; javac -version -Xlint:deprecation */*.java
package p1;
@Deprecated public class A {}
package p2;
import p1.A;
class B {}
package p3;
class C {
    p1.A a;
}
package p4;
import p1.A;
class D {
    A a;
}
javac 1.6.0_02
p2/B.java:2: warning: [deprecation] p1.A in p1 has been deprecated
import p1.A;
         ^
p3/C.java:3: warning: [deprecation] p1.A in p1 has been deprecated
    p1.A a;
      ^
p4/D.java:2: warning: [deprecation] p1.A in p1 has been deprecated
import p1.A;
         ^
p4/D.java:4: warning: [deprecation] p1.A in p1 has been deprecated
    A a;
    ^
4 warnings
---%<---

1. In D.java, p1.A is only really "used" once (as the type of a field) yet two warnings are issued. This seems unnecessary.

2. In B.java, p1.A is not really used at all (will not appear in B.class), yet a warning is still issued. I would think the more useful warning would be that there is an unused import; the fact that the imported class happens to be deprecated is secondary.

My suggested output from javac, assuming a hypothetical new lint category 'imports' for unused imports (which all modern IDEs already show as some kind of warning):

---%<---
$ javac -Xlint:deprecation,imports */*.java
p2/B.java:2: warning: [imports] import p1.A is unused
import p1.A;
       ^
p3/C.java:3: warning: [deprecation] p1.A in p1 has been deprecated
    p1.A a;
      ^
p4/D.java:4: warning: [deprecation] p1.A in p1 has been deprecated
    A a;
    ^
3 warnings
---%<---