Remove superfluous scanner test.
Remove superfluous scanner test.

The test was added to check that Impala can read the scalar
columns of a Parquet table with complex types, before we had
support for complex types. Now this test is superfluous as
indicated in the test by a TODO.

Change-Id: I7ff900e83c7a088e274b570343222ad84dadb84f
Reviewed-on: http://gerrit.cloudera.org:8080/1727
Reviewed-by: Alex Behm <fe1626037acfc2dc542d2aa723a6d14f2464a20c@cloudera.com>
Tested-by: Internal Jenkins

ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC