TEZ-4721: Remove legacy Hadoop 2.x support and hadoop-shim modules

README.md

@@ -97,10 +97,6 @@ you can bundle AWS-S3 or Azure support:
 mvn package -Dhadoop.version=3.4.2 -Paws -Pazure
 ```
 
-Tez also has shims to provide version-specific implementations for various APIs.
-For more details, refer to
-[Hadoop Shims](https://cwiki.apache.org/confluence/display/TEZ/HadoopShims).
-
 Tez UI
 ------
 

docs/src/site/markdown/install.md

@@ -19,12 +19,10 @@
 
 Install/Deploy Instructions for Tez
 ---------------------------------------------------------------------------
-Replace x.y.z with the tez release number that you are using. E.g. 0.5.0. For Tez 
-versions 0.8.3 and higher, Tez needs Apache Hadoop to be of version 2.6.0 or higher.
-For Tez version 0.9.0 and higher, Tez needs Apache Hadoop to be version 2.7.0
-or higher.
+Replace x.y.z with the tez release number that you are using. E.g. 0.5.0. Tez 
+needs Apache Hadoop to be of version 3.x.
 
-1.  Deploy Apache Hadoop using version of 2.7.0 or higher.
+1.  Deploy Apache Hadoop using version of 3.x.
     -   You need to change the value of the hadoop.version property in the
         top-level pom.xml to match the version of the hadoop branch being used.