libjsoundsolmidi.so does not exist in JFB6u21 self extract but in package base JFB6u21

The customer has requested to remove libjsoundsolmidi.so file from SUNWj6rt/SUNWj5rt package.

libjsoundsolmidi.so file does not exist in JFB6u21 self extract but in package base JFB6u21.

package base 6u21
-------------------------------------------------------------------------------
/usr/jdk/instances/jdk1.6.0/jre/lib/sparc:
-rwxr-xr-x 1 root bin 15232 11? 29? 2006? libjsoundsolmidi.so
/usr/jdk/instances/jdk1.6.0/jre/lib/sparcv9:
-rwxr-xr-x 1 root bin 20872 11? 29? 2006? libjsoundsolmidi.so
-------------------------------------------------------------------------------

this also exists in package base Java SE for Business 5 update 25
-------------------------------------------------------------------------------
/usr/jdk/jdk1.5.0_25/jre/lib/sparc:
-rw-r--r-- 1 root bin 15228 12? 7? 2004? libjsoundsolmidi.so
/usr/jdk/jdk1.5.0_25/jre/lib/sparcv9:
-rw-r--r-- 1 root bin 20872 12? 7? 2004? libjsoundsolmidi.so
-------------------------------------------------------------------------------

Checking previous JRE version,
libjsoundsolmidi.so file exists till 6u17-b12 in file base JFB, but it has removed in 6u18(build 1.6.0_18-b07).
# find ./jre1.6.0_17/ -name libjsoundsolmidi.so
./jre1.6.0_17/lib/sparc/libjsoundsolmidi.so
# find ./jre1.6.0_18/ -name libjsoundsolmidi.so
#