ci: bison already installed on github ci

.github/workflows/ci.yml

@@ -19,7 +19,6 @@ jobs:
             -   name: Setup Golang
                 run: |
                     sudo apt-get update;
-                    sudo apt-get install bison;
                     bash < <(curl -s -S -L https://raw.githubusercontent.com/moovweb/gvm/master/binscripts/gvm-installer);
                     source ~/.gvm/scripts/gvm;
                     gvm install go1.4 -B;