Remove older changelogs

debian/changelog

-sqlmap (1.5.9-0parrot1) rolling-testing; urgency=medium
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-  * New upstream version 1.5.9
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- -- Nong Hoang Tu <dmknght@parrotsec.org>  Wed, 08 Sep 2021 01:02:25 +0700
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-sqlmap (1.5.8-0parrot2) rolling; urgency=medium
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-  * Change launcher name prefix
-  * Update name and change launcher to use full help
-  * Improve description
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- -- Nong Hoang Tu <dmknght@parrotsec.org>  Sat, 21 Aug 2021 07:24:58 +0700
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-sqlmap (1.5.8-0parrot1) rolling-testing; urgency=medium
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-  * New upstream version 1.5.8
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- -- Nong Hoang Tu <dmknght@parrotsec.org>  Mon, 09 Aug 2021 01:41:50 +0700
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-sqlmap (1.5.7-0parrot1) rolling-testing; urgency=medium
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-  * New upstream version 1.5.7
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- -- Nong Hoang Tu <dmknght@parrotsec.org>  Sun, 11 Jul 2021 12:50:10 +0700
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 sqlmap (1.5.6-0parrot1) rolling-testing; urgency=medium
 
   * New upstream version 1.5.6