IMPALA-6831: [DOCS] Remove the note about TLS1.2 on RHEL 6 and CentOS 6
IMPALA-6831: [DOCS] Remove the note about TLS1.2 on RHEL 6 and CentOS 6

Change-Id: I710dd809e6a3f8dee89f4ed8997bba0c2aa2c783
Reviewed-on: http://gerrit.cloudera.org:8080/9983
Reviewed-by: Sailesh Mukil <a0dfbcae8e92bb4f48772d8c6743e175570f6f74@cloudera.com>
Tested-by: Impala Public Jenkins <039b6b20426ff68ebe492b3021890d8c8fd010c9@cloudera.com>

cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala