removed all lines with 'Conceptual' to address validation errors

.openpublishing.publish.config.json

@@ -14,7 +14,6 @@
       ],
       "open_to_public_contributors": true,
       "type_mapping": {
-        "Conceptual": "Content",
         "ManagedReference": "Content",
         "RestApi": "Content",
         "LandingData": "Content"
@@ -120,9 +119,7 @@
     {
       "TopLevelTOC": "docs-ref-mapping/reference-latest.yml",
       "ReferenceTOC": "docs-ref-autogen/toc.yml",
-      "ConceptualTOC": "docs-ref-conceptual/toc.yml",
       "ReferenceTOCUrl": "/java/api/azure/toc.json",
-      "ConceptualTOCUrl": "/java/azure/toc.json",
       "OutputFolder": "docs-ref-autogen/overview",
       "HideEmptyNode": false,
       "ContainerPageMetadata": {
@@ -135,9 +132,7 @@
     {
       "TopLevelTOC": "preview/docs-ref-mapping/reference-preview.yml",
       "ReferenceTOC": "preview/docs-ref-autogen/toc.yml",
-      "ConceptualTOC": "docs-ref-conceptual/toc.yml",
       "ReferenceTOCUrl": "/java/api/azure/toc.json",
-      "ConceptualTOCUrl": "/java/azure/toc.json",
       "OutputFolder": "preview/docs-ref-autogen/overview",
       "HideEmptyNode": false,
       "ContainerPageMetadata": {
@@ -150,9 +145,7 @@
     {
       "TopLevelTOC": "legacy/docs-ref-mapping/reference.yml",
       "ReferenceTOC": "legacy/docs-ref-autogen/toc.yml",
-      "ConceptualTOC": "docs-ref-conceptual/toc.yml",
       "ReferenceTOCUrl": "/java/api/azure-java-sdk/toc.json?view=azure-java-legacy",
-      "ConceptualTOCUrl": "/java/azure/toc.json?view=azure-java-legacy",
       "OutputFolder": "legacy/docs-ref-autogen/overview",
       "HideEmptyNode": false,
       "ContainerPageMetadata": {