Merge pull request #187 from Ghost141/challenges_api_improvement

Fix sortcolumn error.

Author: wenhui-wd

queries/search_software_studio_challenges_count

@@ -91,5 +91,3 @@ AND NVL(pr.prize1, 0) >= @prilower@
 AND NVL(pr.prize1, 0) <= @priupper@
 AND p.tc_direct_project_id = DECODE(@tcdirectid@, 0, p.tc_direct_project_id, @tcdirectid@)
 AND NVL(LOWER(pi.cmc_task_id), '') = DECODE('@cmc@', '', NVL(LOWER(pi.cmc_task_id), ''), '@cmc@')
-
-ORDER BY @sortColumn@ @sortOrder@