Remove redundant CI dependencies

.drone.yml

@@ -9,8 +9,7 @@ steps:
   - name: build & test
     image: ubuntu:latest
     commands:
-      - apt-get update
-      - apt-get install -y git git-lfs openssl xz-utils wget libsdl2-dev glslang-tools spirv-tools
+      - apt-get install -y openssl xz-utils wget
       - wget https://ziglang.org/download/$${ZIG_VERSION}/zig-x86_64-linux-$${ZIG_VERSION}.tar.xz
       - tar -xf zig-x86_64-linux-$${ZIG_VERSION}.tar.xz
       - export PATH=$PATH:$(pwd)/zig-x86_64-linux-$${ZIG_VERSION}