Request for Review: Remove import of empty JNI header files

[Magnus Ihse Bursie]

There are a few files native files in AWT and Java2d, which include 
generated JNI header files, but the corresponding header files are 
empty, since the class contains neither native methods nor constants.

All of them have probably been useful at one point in time, but then the 
Java code changed and the include became irrelevant, but nobody noticed. 
(Some of them contains JDK1.0-style, pre-JNI native access...)

The trouble is, in the new build system, we only generate JNI header 
files when they actually contains something useful! So these files don't 
get generated. But then the compiler complains when building the native 
library, since the #include statements points to non-existent files.

Webrev:
http://cr.openjdk.java.net/~ihse/remove-empty-imports/webrev.00/

/Magnus