Backports DOCSP-46961 to v6.0 (#695)

Backports #692

Author: sarahsimpers

source/core/requirements.txt

@@ -412,7 +412,7 @@ Intel/AMD (``x86_64``) Hardware Architectures
      - 9, 10, 11
      - 10, 11
 
-   * - :abbr:`RHEL (Red Hat Enterprise Linux)` / CentOS :sup:`1`
+   * - :abbr:`RHEL (Red Hat Enterprise Linux)` / CentOS
      - 7, 8
      - 7, 8, 9
 
@@ -424,8 +424,6 @@ Intel/AMD (``x86_64``) Hardware Architectures
      - 18.04, 20.04
      - 18.04, 20.04
 
-:sup:`1` :abbr:`RHEL (Red Hat Enterprise Linux)` is different from :abbr:`RHEL (Red Hat Enterprise Linux)` Server. |mms| supports only :abbr:`RHEL (Red Hat Enterprise Linux)`.
-
 .. note::
 
    Though the {+mdbagent+} can be installed on ``s390x`` and on