Flatten testbed repository layout

.gitea/workflows/build-ci-image.yml

@@ -3,7 +3,7 @@ name: build-ci-image
 on:
   push:
     paths:
-      - ci/Dockerfile
+      - Dockerfile
       - .dockerignore
       - .gitea/workflows/build-ci-image.yml
   workflow_dispatch:
@@ -44,7 +44,7 @@ jobs:
             --build-arg LLVM_VERSION=22 \
             --build-arg MESON_VERSION=latest \
             -t "$REGISTRY_IMAGE:latest" \
-            -f ci/Dockerfile .
+            -f Dockerfile .
 
       - name: Push CI image
         run: |

.gitea/workflows/build.yml

@@ -1,34 +0,0 @@
-name: build
-
-# This is a manual smoke-test for the already-published image.
-# Do not run it on every push in this image repository, because the first push
-# happens before the image exists in the registry.
-on:
-  workflow_dispatch:
-
-jobs:
-  linux:
-    runs-on: ubuntu-latest
-
-    container:
-      image: git.neosisyphus.com/evol3d/evol-testbed:latest
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Check CI toolchain
-        run: |
-          clang --version
-          clang++ --version
-          meson --version
-          ninja --version
-          python3 --version
-          vulkaninfo --summary || true
-
-      - name: Configure
-        run: |
-          meson setup build
-
-      - name: Build
-        run: |
-          meson compile -C build