Revert: spec changes for Libmary Management in bigDataPool (Azure#11612)

* Revert "attributes added in LibraryInfo in BigDataPool specs (Azure#11415)"

This reverts commit 5d48a7d.

* Revert "Custom Library support in Spark pool (Azure#11172)"

This reverts commit c653ee7.

Co-authored-by: Navneet Singh <navsi@microsoft.com>

specification/synapse/resource-manager/Microsoft.Synapse/preview/2019-06-01-preview/bigDataPool.json

@@ -416,10 +416,6 @@
           "type": "boolean",
           "description": "Whether compute isolation is required or not."
         },
-        "sessionLevelPackagesEnabled": {
-          "type": "boolean",
-          "description": "Whether session level library/package management is enabled or not."
-        },
         "sparkEventsFolder": {
           "type": "string",
           "description": "The Spark events folder"
@@ -433,13 +429,6 @@
           "$ref": "#/definitions/LibraryRequirements",
           "description": "Library version requirements"
         },
-        "customLibraries": {
-          "description": "List of custom libraries/packages associated with the spark pool.",
-          "type": "array",
-          "items": {
-            "$ref": "#/definitions/LibraryInfo"
-          }
-        },
         "sparkConfigProperties": {
           "$ref": "#/definitions/LibraryRequirements",
           "description": "Spark configuration file to specify additional properties"
@@ -520,44 +509,6 @@
         }
       }
     },
-    "LibraryInfo": {
-      "type": "object",
-      "description": "Library/package information of a Big Data pool powered by Apache Spark",
-      "title": "Information about a library/package created at the workspace level.",
-      "properties": {
-        "name": {
-          "type": "string",
-          "description": "Name of the library."
-        },
-        "path": {
-          "type": "string",
-          "description": "Storage blob path of library."
-        },
-        "containerName": {
-          "type": "string",
-          "description": "Storage blob container name."
-        },
-        "uploadedTimestamp": {
-          "type": "string",
-          "format": "date-time",
-          "description": "The last update time of the library."
-        },
-        "type": {
-          "type": "string",
-          "description": "Type of the library."
-        },
-        "provisioningStatus": {
-          "readOnly": true,
-          "type": "string",
-          "description": "Provisioning status of the library/package."
-        },
-        "creatorId": {
-          "readOnly": true,
-          "type": "string",
-          "description": "Creator Id of the library/package."
-        }
-      }
-    },
     "LibraryRequirements": {
       "type": "object",
       "description": "Library requirements for a Big Data pool powered by Apache Spark",