ci: Remove path-ignore in Nix CI

Author: jorisv

.github/workflows/nix.yml

@@ -4,23 +4,7 @@ on:
   push:
     branches:
       - devel
-    paths-ignore:
-      - 'doc/**'
-      - '.gitlab-ci.yml'
-      - '.gitignore'
-      - '*.md'
-      - 'LICENSE'
-      - 'colcon.pkg'
-      - '.pre-commit-config.yaml'
   pull_request:
-    paths-ignore:
-      - 'doc/**'
-      - '.gitlab-ci.yml'
-      - '.gitignore'
-      - '*.md'
-      - 'LICENSE'
-      - 'colcon.pkg'
-      - '.pre-commit-config.yaml'
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true