Remove pinned certificates for Pithus

Signed-off-by: Muntashir Al-Islam <muntashirakon@riseup.net>

Author: MuntashirAkon

app/src/main/res/xml/network_security_config.xml

@@ -27,25 +27,6 @@
             <pin digest="SHA-256">CLOmM1/OXvSPjw5UOYbAf9GKOxImEp9hhku9W90fHMk=</pin>
         </pin-set>
     </domain-config>
-    <domain-config>
-        <domain includeSubdomains="true">beta.pithus.org</domain>
-        <pin-set expiration="2035-01-03">
-            <!--
-            Resources:
-            https://letsencrypt.org/certificates/
-            https://community.letsencrypt.org/t/hpkp-best-practices-if-you-choose-to-implement/4625
-            -->
-
-            <!-- DST Root CA X3 -->
-            <pin digest="SHA-256">Vjs8r4z+80wjNcr1YKepWQboSIRi63WsWXhIMN+eWys=</pin>
-
-            <!-- ISRG Root X1 -->
-            <pin digest="SHA-256">C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=</pin>
-
-            <!-- ISRG Root X2 -->
-            <pin digest="SHA-256">diGVwiVYbubAI3RW4hB9xU8e/CH2GnkuvVFZE8zmgzI=</pin>
-        </pin-set>
-    </domain-config>
     <domain-config cleartextTrafficPermitted="true">
         <domain includeSubdomains="false">127.0.0.1</domain>
         <domain includeSubdomains="false">localhost</domain>