remove unused extract (#618)

Author: Chris Cho

source/drivers/reactive-streams.txt

@@ -84,8 +84,6 @@ MongoDB Compatibility
 Language Compatibility
 ~~~~~~~~~~~~~~~~~~~~~~
 
-.. include:: /includes/extracts/java-rs-driver-compatibility-matrix-language.rst
-
 .. include:: /includes/language-compatibility-table-java-rs.rst
 
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