refined the main framework article, added redirects, deleted 8 obsolete files

Author: HeidiSteen

.openpublishing.redirection.json

@@ -1,5 +1,45 @@
 {
     "redirections": [
+        {
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+            "redirect_url": "https://docs.microsoft.com/advanced-analytics/concepts/extensibility-framework",
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+        }, 
+        {
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+            "redirect_url": "https://docs.microsoft.com/advanced-analytics/concepts/extensibility-framework",
+            "redirect_document_id": false
+        }, 
+        {
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+            "redirect_url": "https://docs.microsoft.com/advanced-analytics/concepts/extension-r",
+            "redirect_document_id": false
+        }, 
+        {
+            "source_path": "docs/advanced-analytics/r/new-components-in-sql-server-to-support-r",
+            "redirect_url": "https://docs.microsoft.com/advanced-analytics/concepts/extension-r",
+            "redirect_document_id": false
+        }, 
+        {
+            "source_path": "docs/advanced-analytics/python/architecture-overview-sql-server-python.md",
+            "redirect_url": "https://docs.microsoft.com/advanced-analytics/concepts/extensibility-framework",
+            "redirect_document_id": false
+        }, 
+        {
+            "source_path": "docs/advanced-analytics/python/sql-server-python-services.md",
+            "redirect_url": "https://docs.microsoft.com/advanced-analytics/concepts/extension-py",
+            "redirect_document_id": false
+        }, 
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+            "redirect_url": "https://docs.microsoft.com/advanced-analytics/concepts/extension-py",
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+        }, 
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+            "redirect_url": "https://docs.microsoft.com/advanced-analytics/concepts/extension-py",
+            "redirect_document_id": false
+        }, 
         {
             "source_path": "docs/advanced-analytics/r/differences-in-r-features-between-editions-of-sql-server.md",
             "redirect_url": "https://docs.microsoft.com/sql/sql-server/editions-and-components-of-sql-server-2017",