pgsql: Remove Wisconsin benchmark files.

Log Message:
-----------
Remove Wisconsin benchmark files.

This test is clearly not being used anymore, since it's been broken for
long periods of time without anyone noticing. Per discussion, it's not
worth keeping in our source tree.

Removed Files:
-------------
pgsql/src/test/bench:
Makefile
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/Makefile)
WISC-README
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/WISC-README)
create.sh
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/create.sh)
create.source
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/create.source)
perquery
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/perquery)
query01
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query01)
query02
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query02)
query03
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query03)
query04
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query04)
query05
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query05)
query06
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query06)
query07
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query07)
query08
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query08)
query09
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query09)
query10
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query10)
query11
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query11)
query12
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query12)
query13
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query13)
query14
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query14)
query15
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query15)
query16
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query16)
query17
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query17)
query18
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query18)
query19
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query19)
query20
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query20)
query21
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query21)
query22
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query22)
query23
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query23)
query24
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query24)
query25
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query25)
query26
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query26)
query27
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query27)
query28
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query28)
query29
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query29)
query30
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query30)
query31
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query31)
query32
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/query32)
runwisc.sh
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/runwisc.sh)
wholebench.sh
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/bench/wholebench.sh)