Update Dockerfile to remove libcurl and libssl dependencies

Change-Id: I446b452c06b76b33e8ed5520402c90618322c86e
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/Dockerfile b/Dockerfile
index 9206d0c..1ce50d5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -43,8 +43,6 @@
         tox
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get -y install \
-    libcurl4-openssl-dev \
-    libssl-dev \
     dh-make
 
 ENV LC_ALL C.UTF-8