Remove external httpclient manifest

lib/installer-exclude/httpclient.manifest.mf

@@ -1,41 +0,0 @@
-Bundle-Name: Apache Http Client
-Bundle-Description: Apache Http Client
-Bundle-Vendor: jitsi.org
-Bundle-Version: 4.2.3
-Bundle-SymbolicName: org.apache.http
-Import-Package: org.apache.commons.logging,
- javax.security.auth.x500,
- javax.net.ssl
-Export-Package: org.apache.http,
- org.apache.http.entity,
- org.apache.http.entity.mime,
- org.apache.http.entity.mime.content,
- org.apache.http.impl,
- org.apache.http.impl.auth,
- org.apache.http.impl.client,
- org.apache.http.impl.conn,
- org.apache.http.impl.entity,
- org.apache.http.impl.io,
- org.apache.http.io,
- org.apache.http.message,
- org.apache.http.params,
- org.apache.http.protocol,
- org.apache.http.util,
- org.apache.http.annotation,
- org.apache.http.auth,
- org.apache.http.auth.params,
- org.apache.http.client,
- org.apache.http.client.entity,
- org.apache.http.client.methods,
- org.apache.http.client.params,
- org.apache.http.client.protocol,
- org.apache.http.client.utils,
- org.apache.http.conn,
- org.apache.http.conn.params,
- org.apache.http.conn.routing,
- org.apache.http.conn.scheme,
- org.apache.http.conn.ssl,
- org.apache.http.conn.util,
- org.apache.http.impl.client
-
-