ci: remove all caching from CI workflow

Cache infrastructure is not implemented in the Forgejo instance, causing timeouts

Removed:

- actions/cache steps for Go modules, Zig build, native libs, apt packages

- Docker buildx layer caching (cache-from/cache-to)

.forgejo/workflows/ci.yml

@@ -60,16 +60,6 @@ jobs:
         fi
         go version
 
-    - name: Cache Go modules
-      uses: actions/cache@v4
-      with:
-        path: |
-          ~/.cache/go-build
-          ~/go/pkg/mod
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum', '**/go.mod') }}
-        restore-keys: |
-          ${{ runner.os }}-go-
-
     - name: Set up Zig
       run: |
         ZIG_VERSION="${{ env.ZIG_VERSION }}"
@@ -94,34 +84,6 @@ jobs:
         fi
         zig version
 
-    - name: Cache Zig build
-      uses: actions/cache@v4
-      with:
-        path: |
-          ~/.cache/zig
-          cli/zig-cache
-          cli/zig-out
-        key: ${{ runner.os }}-zig-${{ hashFiles('cli/**') }}
-        restore-keys: |
-          ${{ runner.os }}-zig-
-
-    - name: Cache native libraries
-      uses: actions/cache@v4
-      with:
-        path: |
-          native/build/
-        key: ${{ runner.os }}-native-${{ hashFiles('native/**/*.cpp', 'native/**/*.h', 'native/**/CMakeLists.txt') }}
-        restore-keys: |
-          ${{ runner.os }}-native-
-
-    - name: Cache apt packages
-      uses: actions/cache@v4
-      with:
-        path: /var/cache/apt/archives
-        key: ${{ runner.os }}-apt-${{ hashFiles('.forgejo/workflows/*.yml') }}
-        restore-keys: |
-          ${{ runner.os }}-apt-
-
     - name: Install dependencies
       run: |
         go mod download
@@ -211,16 +173,6 @@ jobs:
         fi
         zig version
 
-    - name: Cache Go modules
-      uses: actions/cache@v4
-      with:
-        path: |
-          ~/.cache/go-build
-          ~/go/pkg/mod
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum', '**/go.mod') }}
-        restore-keys: |
-          ${{ runner.os }}-go-
-
     - name: Install build dependencies
       run: |
         sudo apt-get update
@@ -332,14 +284,6 @@ jobs:
         driver-opts: |
           image=moby/buildkit:master
 
-    - name: Cache Docker layers
-      uses: actions/cache@v4
-      with:
-        path: /tmp/.buildx-cache
-        key: ${{ runner.os }}-buildx-${{ github.sha }}
-        restore-keys: |
-          ${{ runner.os }}-buildx-
-
     - name: Login to GitHub Container Registry
       uses: docker/login-action@v3
       with:
@@ -356,5 +300,3 @@ jobs:
         tags: |
           ghcr.io/${{ github.repository }}:latest
           ghcr.io/${{ github.repository }}:${{ github.sha }}
-        cache-from: type=local,src=/tmp/.buildx-cache
-        cache-to: type=local,dest=/tmp/.buildx-cache-new,mode=max