Remove apk and references from bindep.txt

Use bindep only for RPM amd dpkg bases distros

Change-Id: Ia423fb3f9c363cc88e685dd5cd5791aab8e8d806

bindep.txt

@@ -19,11 +19,10 @@ git               [platform:rpm]
 libffi-devel      [platform:rpm]
 openssl-devel     [platform:rpm]
 
-libxml2-dev       [platform:dpkg platform:apk]
+libxml2-dev       [platform:dpkg]
 libxml2-devel     [platform:rpm]
 libxslt-devel     [platform:rpm]
 libxslt1-dev      [platform:dpkg]
-libxslt-dev       [platform:apk]
 
 # RH Mechanisms
 python-rhsm-certificates [platform: redhat]