Move engine-api client package

This moves the engine-api client package to `/docker/docker/client`.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

network_remove.go

@@ -0,0 +1,10 @@
+package client
+
+import "golang.org/x/net/context"
+
+// NetworkRemove removes an existent network from the docker host.
+func (cli *Client) NetworkRemove(ctx context.Context, networkID string) error {
+	resp, err := cli.delete(ctx, "/networks/"+networkID, nil, nil)
+	ensureReaderClosed(resp)
+	return err
+}