diff --git a/.drone-manifest.yml b/.drone-manifest.yml
deleted file mode 100644
index e9b7e97..0000000
--- a/.drone-manifest.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-image: happydomain/checker-dnsviz:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
-{{#if build.tags}}
-tags:
-{{#each build.tags}}
-  - {{this}}
-{{/each}}
-{{/if}}
-manifests:
-  - image: happydomain/checker-dnsviz:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
-    platform:
-      architecture: amd64
-      os: linux
-  - image: happydomain/checker-dnsviz:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
-    platform:
-      architecture: arm64
-      os: linux
-      variant: v8
-  - image: happydomain/checker-dnsviz:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm
-    platform:
-      architecture: arm
-      os: linux
-      variant: v7
diff --git a/.drone.yml b/.drone.yml
deleted file mode 100644
index e609ffb..0000000
--- a/.drone.yml
+++ /dev/null
@@ -1,187 +0,0 @@
----
-kind: pipeline
-type: docker
-name: build-amd64
-
-platform:
-  os: linux
-  arch: amd64
-
-steps:
-  - name: checker build
-    image: golang:1-alpine
-    commands:
-      - apk add --no-cache git make
-      - make
-    environment:
-      CHECKER_VERSION: "${DRONE_BRANCH}-${DRONE_COMMIT}"
-      CGO_ENABLED: 0
-    when:
-      event:
-        exclude:
-          - tag
-
-  - name: checker build tag
-    image: golang:1-alpine
-    commands:
-      - apk add --no-cache git make
-      - make
-    environment:
-      CHECKER_VERSION: "${DRONE_SEMVER}"
-      CGO_ENABLED: 0
-    when:
-      event:
-        - tag
-
-  - name: publish on Docker Hub
-    image: plugins/docker
-    settings:
-      repo: happydomain/checker-dnsviz
-      auto_tag: true
-      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
-      dockerfile: Dockerfile
-      build_args:
-        - CHECKER_VERSION=${DRONE_BRANCH}-${DRONE_COMMIT}
-      username:
-        from_secret: docker_username
-      password:
-        from_secret: docker_password
-    when:
-      event:
-        exclude:
-          - tag
-
-  - name: publish on Docker Hub (tag)
-    image: plugins/docker
-    settings:
-      repo: happydomain/checker-dnsviz
-      auto_tag: true
-      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
-      dockerfile: Dockerfile
-      build_args:
-        - CHECKER_VERSION=${DRONE_SEMVER}
-      username:
-        from_secret: docker_username
-      password:
-        from_secret: docker_password
-    when:
-      event:
-        - tag
-
-trigger:
-  branch:
-    exclude:
-      - renovate/*
-  event:
-    - cron
-    - push
-    - tag
-
----
-kind: pipeline
-type: docker
-name: build-arm64
-
-platform:
-  os: linux
-  arch: arm64
-
-steps:
-  - name: checker build
-    image: golang:1-alpine
-    commands:
-      - apk add --no-cache git make
-      - make
-    environment:
-      CHECKER_VERSION: "${DRONE_BRANCH}-${DRONE_COMMIT}"
-      CGO_ENABLED: 0
-    when:
-      event:
-        exclude:
-          - tag
-
-  - name: checker build tag
-    image: golang:1-alpine
-    commands:
-      - apk add --no-cache git make
-      - make
-    environment:
-      CHECKER_VERSION: "${DRONE_SEMVER}"
-      CGO_ENABLED: 0
-    when:
-      event:
-        - tag
-
-  - name: publish on Docker Hub
-    image: plugins/docker
-    settings:
-      repo: happydomain/checker-dnsviz
-      auto_tag: true
-      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
-      dockerfile: Dockerfile
-      build_args:
-        - CHECKER_VERSION=${DRONE_BRANCH}-${DRONE_COMMIT}
-      username:
-        from_secret: docker_username
-      password:
-        from_secret: docker_password
-    when:
-      event:
-        exclude:
-          - tag
-
-  - name: publish on Docker Hub (tag)
-    image: plugins/docker
-    settings:
-      repo: happydomain/checker-dnsviz
-      auto_tag: true
-      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
-      dockerfile: Dockerfile
-      build_args:
-        - CHECKER_VERSION=${DRONE_SEMVER}
-      username:
-        from_secret: docker_username
-      password:
-        from_secret: docker_password
-    when:
-      event:
-        - tag
-
-trigger:
-  event:
-    - cron
-    - push
-    - tag
-
----
-kind: pipeline
-name: docker-manifest
-
-platform:
-  os: linux
-  arch: arm64
-
-steps:
-  - name: publish on Docker Hub
-    image: plugins/manifest
-    settings:
-      auto_tag: true
-      ignore_missing: true
-      spec: .drone-manifest.yml
-      username:
-        from_secret: docker_username
-      password:
-        from_secret: docker_password
-
-trigger:
-  branch:
-    exclude:
-      - renovate/*
-  event:
-    - cron
-    - push
-    - tag
-
-depends_on:
-  - build-amd64
-  - build-arm64
diff --git a/checker/provider.go b/checker/provider.go
index a7d9825..ad7e3b3 100644
--- a/checker/provider.go
+++ b/checker/provider.go
@@ -4,16 +4,10 @@ package checker
 
 import (
 	"context"
-	"errors"
 
 	sdk "git.happydns.org/checker-sdk-go/checker"
 )
 
-// ErrNoCollector is returned by Collect when the provider was constructed
-// without a CollectFn (e.g. when registered host-side as an externalizable-only
-// provider). Callers should route the observation to an external checker.
-var ErrNoCollector = errors.New("dnsviz: provider has no local collector; use an external checker")
-
 // CollectFn is the function signature for the DNSViz data collection step.
 // The checker package is decoupled from the subprocess invocation so it can
 // be imported without GPL obligations. Implementations live in the binary or
@@ -33,8 +27,5 @@ func (p *dnsvizProvider) Key() sdk.ObservationKey {
 }
 
 func (p *dnsvizProvider) Collect(ctx context.Context, opts sdk.CheckerOptions) (any, error) {
-	if p.collect == nil {
-		return nil, ErrNoCollector
-	}
 	return p.collect(ctx, opts)
 }