fix dupe

APT_CyberCriminal_Campagin_Collections/2017/2017.10.19.Operation_PZCHAO/Bitdefender-Business-2017-WhitePaper-PZCHAO-crea2452-en-EN-GenericUse.pdf
APT_CyberCriminal_Campagin_Collections/2018/2018.02.01.operation-pzchao/Bitdefender-Business-2017-WhitePaper-PZCHAO-crea2452-en-EN-GenericUse.pdf

README.md

@@ -571,7 +571,6 @@ APT28 group](http://csecybsec.com/download/zlab/20180713_CSE_APT28_X-Agent_Op-Ro
 * Feb 13 - [[RSA] Lotus Blossom Continues ASEAN Targeting](https://community.rsa.com/community/products/netwitness/blog/2018/02/13/lotus-blossom-continues-asean-targeting) | [:closed_book:](../../blob/master/2018/2018.02.13.Lotus-Blossom-Continues) 
 * Feb 07 - [[CISCO] Targeted Attacks In The Middle East](http://blog.talosintelligence.com/2018/02/targeted-attacks-in-middle-east.html) | [:closed_book:](../../blob/master/2018/2018.02.07.targeted-attacks-in-middle-east_VBS_CAMPAIGN)  
 * Feb 02 - [[McAfee] Gold Dragon Widens Olympics Malware Attacks, Gains Permanent Presence on Victims’ Systems](https://securingtomorrow.mcafee.com/mcafee-labs/gold-dragon-widens-olympics-malware-attacks-gains-permanent-presence-on-victims-systems/) | [:closed_book:](../../blob/master/2018/2018.02.02.gold-dragon-widens-olympics-malware)  
-* Feb 01 - [[Bitdefender] Operation PZChao: a possible return of the Iron Tiger APT](https://labs.bitdefender.com/2018/02/operation-pzchao-a-possible-return-of-the-iron-tiger-apt/) | [:closed_book:](../../blob/master/2018/2018.02.01.operation-pzchao)  
 * Jan 30 - [[Palo Alto Networks] Comnie Continues to Target Organizations in East Asia](https://researchcenter.paloaltonetworks.com/2018/01/unit42-comnie-continues-target-organizations-east-asia/) | [:closed_book:](../../blob/master/2018/2018.01.31.Comnie_Continues_to_Target_Organizations_in_East_Asia)  
 * Jan 30 - [[RSA] APT32 Continues ASEAN Targeting](https://community.rsa.com/community/products/netwitness/blog/2018/01/30/apt32-continues-asean-targeting) | [:closed_book:](../../blob/master/2018/2018.01.30.APT32_Continues_ASEAN_Targeting)  
 * Jan 29 - [[Trend Micro] Hacking Group Spies on Android Users in India Using PoriewSpy](https://blog.trendmicro.com/trendlabs-security-intelligence/hacking-group-spies-android-users-india-using-poriewspy/) | [:closed_book:](../../blob/master/2018/2018.01.29.PoriewSpy.India)