Removed blank lines.
Removed unnecessary lines.

Regex used to find lines: `
<(bug_id|creation_ts|delta_ts|reporter_accessible|cclist_accessible|classification_id|classification|product|version|rep_platform|op_sys|bug_file_loc|status_whiteboard|keywords|priority|bug_severity|target_milestone|everconfirmed|cc)>.+\n`
and `          <(reporter|assigned_to) name=".+\n` and `
<(commentid>|who name="|bug_when>).+\n`.