GitHub CI: Remove unnecessary flags

These flags do not exist, they're there because I used the file from FastClick

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ on:
  branches: [ master ]
 env:
  CXXFLAGS: -std=gnu++11
- FLAGS: --enable-all-elements --enable-simtime
+ FLAGS: --enable-all-elements
 
  #Until we find a solution for the world-writable /home/runner in GitHub Actions...
  NODPDKTEST: 1
@@ -20,7 +20,7 @@ jobs:
  strategy:
  matrix:
  COMPILER: [gcc, clang]
- FRAMEWORK: [vanilla, dpdk, netmap, vanilla-nopool]
+ FRAMEWORK: [vanilla, dpdk, netmap]
 
  steps:
  - uses: actions/checkout@v2
@@ -63,9 +63,6 @@ jobs:
  echo "FRAMEWORK_FLAGS=$FRAMEWORK_FLAGS" >> $GITHUB_ENV
  echo "PKG_CONFIG_PATH=$PKG_CONFIG_PATH" >> $GITHUB_ENV
  echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH" >> $GITHUB_ENV
- elif [ "${{matrix.FRAMEWORK}}" = "vanilla-nopool" ] ; then
- FRAMEWORK_FLAGS="$FRAMEWORK_FLAGS --disable-click-pool"
- echo "FRAMEWORK_FLAGS=$FRAMEWORK_FLAGS" >> $GITHUB_ENV
  fi
  - name: configure
  run: |