The argument "Rerun" is not deleting the old report file for report-ad-leads-data.sh script

The argument "Rerun" is not deleting the report file for report-ad-leads-data.sh script/

1.[amlops@aml-qa4-monman1 performance]$ ./report-ad-leads-data.sh -h aml-qa4-mysql1 -u spike -p tar63t -r qa4amltest -d 2016-04-08
.
.
.Using /tmp/ad_leads_data_reports/ for output directory.

.
..
2.Check the csv content and rows

[amlops@aml-qa4-monman1 performance]$ wc -l /tmp/ad_leads_data_reports/Bing-qa4amltest-ad-leads-data-2016-04-08.csv
9 /tmp/ad_leads_data_reports/Bing-qa4amltest-ad-leads-data-2016-04-08.csv

3.Now run the script with option rerun

./report-ad-leads-data.sh -h aml-qa4-mysql1 -u spike -p tar63t -r qa4amltest -d 2016-04-08 -n

./report-ad-leads-data.sh -h aml-qa4-mysql1 -u spike -p tar63t -r qa4amltest -d 2016-04-08 -n

4.Check the content of the csv

Actual Result:

Ad leads data is appending in the existing csv file.

[amlops@aml-qa4-monman1 performance]$ wc -l /tmp/ad_leads_data_reports/Bing-qa4amltest-ad-leads-data-2016-04-08.csv
17 /tmp/ad_leads_data_reports/Bing-qa4amltest-ad-leads-data-2016-04-08.csv

Please see

https://bitbucket.org/tsa/ops-scripts/commits/2eba9d42d4d57d2347b490864ea3f11ba1c924b2?at=develop#chg-scripts/report-ad-leads-data.sh

Expected Result:

Rerun option should delete the old file, recreate a new adwords level data csv.

P.S. This is observed for the script report-keyword-leads-data.sh also