Remove vestigial applyTo from parser validFields allowlist (#36309)

Author: Copilot

pkg/parser/include_processor.go

@@ -264,7 +264,6 @@ func collectUnexpectedIncludedFrontmatterFields(frontmatter map[string]any) []st
 		"runtimes":                 true,
 		"permissions":              true,
 		"secret-masking":           true,
-		"applyTo":                  true,
 		"inputs":                   true,
 		"import-schema":            true,
 		"disable-model-invocation": true,

pkg/parser/schema_utilities_test.go

@@ -35,32 +35,6 @@ func TestFilterIgnoredFields(t *testing.T) {
 				"on":          "push",
 			},
 		},
-		{
-			name: "frontmatter with applyTo - no longer filtered",
-			frontmatter: map[string]any{
-				"applyTo": "some-value",
-				"on":      "push",
-			},
-			expected: map[string]any{
-				"applyTo": "some-value",
-				"on":      "push",
-			},
-		},
-		{
-			name: "frontmatter with both description and applyTo - no longer filtered",
-			frontmatter: map[string]any{
-				"description": "This is a test workflow",
-				"applyTo":     "some-value",
-				"on":          "push",
-				"engine":      "claude",
-			},
-			expected: map[string]any{
-				"description": "This is a test workflow",
-				"applyTo":     "some-value",
-				"on":          "push",
-				"engine":      "claude",
-			},
-		},
 		{
 			name: "frontmatter with only valid fields",
 			frontmatter: map[string]any{