remove next-project placeholder and .projectsignore

Author: CameronBrooks11

.github/workflows/validate.yml

@@ -43,17 +43,10 @@ jobs:
         run: |
           python - <<'EOF'
           import sys, pathlib
-          ignore_file = pathlib.Path(".projectsignore")
-          ignored = set()
-          if ignore_file.exists():
-              for line in ignore_file.read_text().splitlines():
-                  line = line.strip()
-                  if line and not line.startswith("#"):
-                      ignored.add(line)
           errors = []
           checked = 0
           for project in pathlib.Path("projects").iterdir():
-              if not project.is_dir() or project.name in ignored:
+              if not project.is_dir():
                   continue
               checked += 1
               mp = project / "machine-profile.yaml"
@@ -64,7 +57,7 @@ jobs:
               for e in errors:
                   print(f"  {e}")
               sys.exit(1)
-          print(f"All {checked} project(s) have machine-profile.yaml (skipped: {ignored or 'none'})")
+          print(f"All {checked} project(s) have machine-profile.yaml")
           EOF
 
       - name: Verify no .anpkg files committed