Remove apt installing gcc since it is already installed in the image

Author: iceiix

.circleci/config.yml

@@ -44,5 +44,5 @@ commands:
                 name: Install deps
                 command: |
                     sudo apt-get update -qq
-                    sudo apt-get install -y gcc libegl1-mesa-dev libgles2-mesa-dev
+                    sudo apt-get install -y libegl1-mesa-dev libgles2-mesa-dev