ci, flake: drop proto/buf lint and tooling

The proto/gRPC stack is gone; remove the buf lint job and the protobuf/grpc/buf
nix dev-shell inputs.

.github/workflows/lint.yml

@@ -77,17 +77,3 @@ jobs:
         if: steps.changed-files.outputs.files == 'true'
         run: nix develop --fallback --command -- prettier --no-error-on-unmatched-pattern
           --ignore-unknown --check **/*.{ts,js,md,yaml,yml,sass,css,scss,html}
-
-  proto-lint:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
-      - uses: nixbuild/nix-quick-install-action@2c9db80fb984ceb1bcaa77cdda3fdf8cfba92035 # v34
-      - uses: nix-community/cache-nix-action@135667ec418502fa5a3598af6fb9eb733888ce6a # v6.1.3
-        with:
-          primary-key: nix-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('**/*.nix',
-            '**/flake.lock') }}
-          restore-prefixes-first-match: nix-${{ runner.os }}-${{ runner.arch }}
-
-      - name: Buf lint
-        run: nix develop --fallback --command -- buf lint proto

flake.nix

@@ -66,40 +66,6 @@
             subPackages = [ "cmd/hi" ];
           };
 
-          protoc-gen-grpc-gateway = buildGo rec {
-            pname = "grpc-gateway";
-            version = "2.29.0";
-
-            src = pkgs.fetchFromGitHub {
-              owner = "grpc-ecosystem";
-              repo = "grpc-gateway";
-              rev = "v${version}";
-              sha256 = "sha256-d9OIIGttyMBSNgpS6mbR5JEIm13qGu2gFHJazJAexdw=";
-            };
-
-            vendorHash = "sha256-p51yD+v8+rPs+ztlX7r0VQ4XlwUkxu+PxgknKEvH00k=";
-
-            nativeBuildInputs = [ pkgs.installShellFiles ];
-
-            subPackages = [ "protoc-gen-grpc-gateway" "protoc-gen-openapiv2" ];
-          };
-
-          protobuf-language-server = buildGo rec {
-            pname = "protobuf-language-server";
-            version = "ab4c128";
-
-            src = pkgs.fetchFromGitHub {
-              owner = "lasorda";
-              repo = "protobuf-language-server";
-              rev = "ab4c128f00774d51bd6d1f4cfa735f4b7c8619e3";
-              sha256 = "sha256-yF6kG+qTRxVO/qp2V9HgTyFBeOm5RQzeqdZFrdidwxM=";
-            };
-
-            vendorHash = "sha256-4nTpKBe7ekJsfQf+P6edT/9Vp2SBYbKz1ITawD3bhkI=";
-
-            subPackages = [ "." ];
-          };
-
           # Build golangci-lint with stock Go 1.26 (upstream uses hardcoded Go
           # version); it does not build against the pinned 1.26.4.
           golangci-lint = buildGo rec {
@@ -195,15 +161,6 @@
             # 'dot' is needed for pprof graphs
             # go tool pprof -http=: <source>
             graphviz
-
-            # Protobuf dependencies
-            protobuf
-            protoc-gen-go
-            protoc-gen-go-grpc
-            protoc-gen-grpc-gateway
-            buf
-            clang-tools # clang-format
-            protobuf-language-server
           ]
           ++ lib.optionals pkgs.stdenv.isLinux [ traceroute ];