remove unnecessary dependency request

Author: LiangliangNan

.github/workflows/test-build-gcc.yml

@@ -21,7 +21,7 @@ jobs:
       - uses: actions/checkout@v1
       - run: sudo apt-get update || true;
              sudo apt-get install ${{ matrix.compilers }};
-             sudo apt-get install build-essential libglu1-mesa-dev freeglut3-dev mesa-common-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev libboost-all-dev;
+             sudo apt-get install build-essential libglu1-mesa-dev mesa-common-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev libboost-all-dev;
              rm -rf Release;
              mkdir Release;
              cd Release;