Remove deprecated JschSession#getSftpChannel method

Change-Id: I5b5d3cbc6b0e5f85df26fe6c288c973cf5609296

org.eclipse.jgit.ssh.jsch/src/org/eclipse/jgit/transport/ssh/jsch/JschSession.java

@@ -34,7 +34,6 @@
 import org.eclipse.jgit.transport.URIish;
 import org.eclipse.jgit.util.io.IsolatedOutputStream;
 
-import com.jcraft.jsch.Channel;
 import com.jcraft.jsch.ChannelExec;
 import com.jcraft.jsch.ChannelSftp;
 import com.jcraft.jsch.JSchException;
@@ -85,22 +84,6 @@ public void disconnect() {
 			sock.disconnect();
 	}
 
-	/**
-	 * A kludge to allow {@link org.eclipse.jgit.transport.TransportSftp} to get
-	 * an Sftp channel from Jsch. Ideally, this method would be generic, which
-	 * would require implementing generic Sftp channel operations in the
-	 * RemoteSession class.
-	 *
-	 * @return a channel suitable for Sftp operations.
-	 * @throws com.jcraft.jsch.JSchException
-	 *             on problems getting the channel.
-	 * @deprecated since 5.2; use {@link #getFtpChannel()} instead
-	 */
-	@Deprecated
-	public Channel getSftpChannel() throws JSchException {
-		return sock.openChannel("sftp"); //$NON-NLS-1$
-	}
-
 	/**
 	 * {@inheritDoc}
 	 *