docs: Remove Cgroups v1 references

Wherever cgroups v2 references were mentioned by name, those have been
set to defaults.

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>

Author: lsm5

docs/source/locale/ja/LC_MESSAGES/markdown.po

@@ -8458,8 +8458,7 @@ msgstr ""
 #: ../../source/markdown/podman-create.1.md:185
 #: ../../source/markdown/podman-run.1.md:204
 msgid ""
-"If the host uses cgroups v1, the default is set to **host**. On cgroups "
-"v2, the default is **private**."
+The default is **private**."
 msgstr ""
 
 #: ../../source/markdown/podman-create.1.md:191
@@ -23003,7 +23002,7 @@ msgstr ""
 #: ../../source/markdown/podman-pod-stats.1.md:11
 msgid ""
 "Display a live stream of containers in one or more pods resource usage "
-"statistics.  Running rootless is only supported on cgroups v2."
+"statistics."
 msgstr ""
 
 #: ../../source/markdown/podman-pod-stats.1.md:17
@@ -30162,11 +30161,7 @@ msgid "update a container with a new cpu quota and period"
 msgstr ""
 
 #: ../../source/markdown/podman-update.1.md:331
-msgid "update a container with all available options for cgroups v2"
-msgstr ""
-
-#: ../../source/markdown/podman-update.1.md:336
-msgid "update a container with all available options for cgroups v1"
+msgid "update a container with all available options"
 msgstr ""
 
 #: ../../source/markdown/podman-update.1.md:342

docs/source/markdown/options/cgroupns.md

@@ -11,4 +11,4 @@ Set the cgroup namespace mode for the container.
 - **private**: create a new cgroup namespace.
 - **ns:**_path_: join the namespace at the specified path.
 
-If the host uses cgroups v1, the default is set to **host**. On cgroups v2, the default is **private**.
+The default is **private**.

docs/source/markdown/podman-pod-stats.1.md.in

@@ -7,7 +7,7 @@ podman\-pod\-stats - Display a live stream of resource usage stats for container
 **podman pod stats** [*options*] [*pod*]
 
 ## DESCRIPTION
-Display a live stream of containers in one or more pods resource usage statistics.  Running rootless is only supported on cgroups v2.
+Display a live stream of containers in one or more pods resource usage statistics.
 
 ## OPTIONS
 

docs/source/markdown/podman-stats.1.md.in

@@ -11,11 +11,7 @@ podman\-stats - Display a live stream of one or more container's resource usage
 ## DESCRIPTION
 Display a live stream of one or more containers' resource usage statistics
 
-Note:  Podman stats does not work in rootless environments that use cgroups v1.
-Podman stats relies on cgroup information for statistics, and cgroup v1 is not
-supported for rootless use cases.
-
-Note: Rootless environments that use cgroups v2 are not able to report statistics
+Note: Rootless environments are not able to report statistics
 about their networking usage.
 
 ## OPTIONS