Minor code tidy up ofjavalang/parser.py. Removed some unused variables and one unused import.

Signed-off-by: David Black <dblack@atlassian.com>
Merge branch 'python_3_support' into minor_code_fixup
Merge branch 'python_3_support' into minor_code_fixup
Merge branch 'python_3_support' into minor_code_fixup
Merge pull request #12 from dbaxa/minor_code_fixup

Minor code fixup