Simplify copyright check for CI

.github/workflows/main.yml

@@ -26,14 +26,7 @@ jobs:
           version: "1.0"
       - run: cargo fmt --all -- --check
       - run: cargo sort --workspace --check
-      - run: |
-          # Check that no source files updated this year have a missing or out-of-date copyright.
-          # Locally, use the following command to check that copyrights have been updated.
-          # comm -12 <(git diff --name-only --pretty=format: origin/HEAD | sort | uniq) <(npx @kt3k/license-checker | grep 'missing copyright' | sort | cut -d ' ' -f 1)
-          set -e
-          MISSING_COPYRIGHT="$(comm -12 <(git diff --name-only --pretty=format: HEAD^ | sort | uniq) <(npx @kt3k/license-checker | grep 'missing copyright' | sort | cut -d ' ' -f 1))"
-          echo $MISSING_COPYRIGHT
-          [ -z "$MISSING_COPYRIGHT" ]
+      - run: npx @kt3k/license-checker
 
   test:
     runs-on: [self-hosted, "${{ matrix.os }}", "${{ matrix.arch }}"]

.tool-versions

@@ -0,0 +1 @@
+nodejs lts