Include shared/attributes.asciidoc from docs master

docs/Versions.asciidoc

@@ -38,4 +38,5 @@ endif::[]
 ///////
 Shared attribute values are pulled from elastic/docs
 ///////
-include::{docs-dir}/shared/attributes.asciidoc[]
+
+include::{asciidoc-dir}/../../shared/attributes.asciidoc[]

docs/painless/index.asciidoc

@@ -1,8 +1,6 @@
 [[painless]]
 = Painless Scripting Language
 
-:docs-dir:  {docdir}/../../../docs
-
 include::../Versions.asciidoc[]
 
 include::painless-getting-started.asciidoc[]

docs/reference/index.asciidoc

@@ -3,7 +3,6 @@
 
 :es-test-dir:           {docdir}/../src/test
 :plugins-examples-dir:  {docdir}/../../plugins/examples
-:docs-dir:              {docdir}/../../../docs
 
 include::../Versions.asciidoc[]
 include::index-shared1.asciidoc[]