Remove unused workspace-header from MainLayout

It was static markup (fixed "Cut planning workspace" / "Ready to plan"
text) that never varied by page or state, so it was pure dead weight.

tests/test_job_results_actions.py

@@ -7,7 +7,6 @@ from pathlib import Path
 
 REPO_ROOT = Path(__file__).resolve().parents[1]
 JOB_EDITOR = REPO_ROOT / "CutList.Web/Components/Pages/Jobs/Edit.razor"
-MAIN_LAYOUT = REPO_ROOT / "CutList.Web/Components/Layout/MainLayout.razor"
 
 
 class JobResultsActionsTests(unittest.TestCase):
@@ -30,13 +29,6 @@ class JobResultsActionsTests(unittest.TestCase):
         self.assertIn(".print-screen-only", report_css)
         self.assertIn("display: none !important;", report_css)
 
-    def test_print_report_hides_workspace_header_and_ready_status(self) -> None:
-        markup = MAIN_LAYOUT.read_text()
-
-        self.assertIn('class="workspace-header print-screen-only"', markup)
-        self.assertIn("Cut planning workspace", markup)
-        self.assertIn("Ready to plan", markup)
-
     def test_print_report_forces_backgrounds_to_plain_white(self) -> None:
         report_css = (REPO_ROOT / "CutList.Web/wwwroot/css/report.css").read_text()
         print_styles = report_css[report_css.index("@media print {"):]