Remove dependencies no longer needed by pycurl

Updates the snapcraft build file to remove libraries that are no
longer needed to publish osmclient

Change-Id: Idedea41c51b96c815acc5e1e886bade8a2e2b8b3
Signed-off-by: Mark Beierl <mark.beierl@canonical.com>
diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
index 59f4f8d..0c2aa94 100644
--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
@@ -53,19 +53,9 @@
       - PIP_COMPILE: "false" # disable .pyc generation in pip
       - PYTHONDONTWRITEBYTECODE: "false" # disable .pyc generation by setup.py
     build-packages:
-      - gcc
-      - git
-      - make
       - wget
-      - libcurl4-openssl-dev
-      - libssl-dev
-      - python3-distutils
-      - python3-dev
-      - python3-pip
-      - python3-pycurl
     stage-packages:
       - libmagic1
-      - libcurl4-openssl-dev
       - python3
     override-build: |
       VERSION=$(git describe --match v* --tags --long --dirty)