Simplify CI - remove sccache and simplify build step

.forgejo/workflows/botserver.yaml

@@ -7,9 +7,6 @@ on:
 env:
   CARGO_BUILD_JOBS: 8
   CARGO_NET_RETRY: 10
-  RUSTC_WRAPPER: sccache
-  SCCACHE_DIR: /tmp/sccache
-  CARGO_HOME: /tmp/cargo
 
 jobs:
   build:
@@ -30,8 +27,6 @@ jobs:
 
       - name: Setup Workspace
         run: |
-          mkdir -p /tmp/sccache
-          mkdir -p /tmp/cargo
           mkdir -p /tmp/persistent-botserver
           mkdir -p /tmp/gb-ws
 
@@ -80,9 +75,7 @@ jobs:
         working-directory: /tmp/persistent-botserver
         run: |
           export PATH="/home/gbuser/.cargo/bin:/home/gbuser/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin:$PATH"
-          sccache --start-server 2>/dev/null || true
-          cargo build --package botserver
-          sccache --stop-server 2>/dev/null || true
+          cargo build --package botserver 2>&1
 
       - name: Deploy
         run: |