Remove beta warning label from categorization fields docs (elastic#1067)

CHANGELOG.next.md

@@ -24,6 +24,7 @@ Thanks, you're awesome :-) -->
 
 #### Improvements
 
+* Event categorization fields GA. #1067
 * Note `[` and `]` bracket characters may enclose a literal IPv6 address when populating `url.domain`. #1131
 
 #### Deprecated

docs/field-values.asciidoc

@@ -2,13 +2,6 @@
 [[ecs-category-field-values-reference]]
 == {ecs} Categorization Fields
 
-WARNING: This section of ECS is in beta and is subject to change. These allowed values
-are still under active development. Additional values will be published gradually,
-and some of the values or relationships described here may change.
-Users who want to provide feedback, or who want to have a look at
-upcoming allowed values can visit this public feedback document
-https://ela.st/ecs-categories-draft.
-
 At a high level, ECS provides fields to classify events in two different ways:
 "Where it's from" (e.g., `event.module`, `event.dataset`, `agent.type`, `observer.type`, etc.),
 and "What it is." The categorization fields hold the "What it is" information,
@@ -38,11 +31,6 @@ This is one of four ECS Categorization Fields, and indicates the highest level i
 
 The value of this field can be used to inform how these kinds of events should be handled. They may warrant different retention, different access control, it may also help understand whether the data coming in at a regular interval or not.
 
-WARNING: After the beta period for categorization, only the allowed categorization
-values listed in the ECS repository and official ECS documentation should be considered
-official. Use of any other values may result in incompatible implementations
-that will require subsequent breaking changes.
-
 *Allowed Values*
 
 * <<ecs-event-kind-alert,alert>>
@@ -125,11 +113,6 @@ This is one of four ECS Categorization Fields, and indicates the second level in
 
 This field is an array. This will allow proper categorization of some events that fall in multiple categories.
 
-WARNING: After the beta period for categorization, only the allowed categorization
-values listed in the ECS repository and official ECS documentation should be considered
-official. Use of any other values may result in incompatible implementations
-that will require subsequent breaking changes.
-
 *Allowed Values*
 
 * <<ecs-event-category-authentication,authentication>>
@@ -345,11 +328,6 @@ This is one of four ECS Categorization Fields, and indicates the third level in
 
 This field is an array. This will allow proper categorization of some events that fall in multiple event types.
 
-WARNING: After the beta period for categorization, only the allowed categorization
-values listed in the ECS repository and official ECS documentation should be considered
-official. Use of any other values may result in incompatible implementations
-that will require subsequent breaking changes.
-
 *Allowed Values*
 
 * <<ecs-event-type-access,access>>
@@ -510,11 +488,6 @@ Also note that in the case of a compound event (a single event that contains mul
 
 Further note that not all events will have an associated outcome. For example, this field is generally not populated for metric events, events with `event.type:info`, or any events for which an outcome does not make logical sense.
 
-WARNING: After the beta period for categorization, only the allowed categorization
-values listed in the ECS repository and official ECS documentation should be considered
-official. Use of any other values may result in incompatible implementations
-that will require subsequent breaking changes.
-
 *Allowed Values*
 
 * <<ecs-event-outcome-failure,failure>>

scripts/templates/field_values.j2

@@ -2,13 +2,6 @@
 [[ecs-category-field-values-reference]]
 == {ecs} Categorization Fields
 
-WARNING: This section of ECS is in beta and is subject to change. These allowed values
-are still under active development. Additional values will be published gradually,
-and some of the values or relationships described here may change.
-Users who want to provide feedback, or who want to have a look at
-upcoming allowed values can visit this public feedback document
-https://ela.st/ecs-categories-draft.
-
 At a high level, ECS provides fields to classify events in two different ways:
 "Where it's from" (e.g., `event.module`, `event.dataset`, `agent.type`, `observer.type`, etc.),
 and "What it is." The categorization fields hold the "What it is" information,
@@ -34,11 +27,6 @@ once the appropriate categorization values are published, in a later release.
 
 {{ field['description']|replace("\n", "\n\n") }}
 
-WARNING: After the beta period for categorization, only the allowed categorization
-values listed in the ECS repository and official ECS documentation should be considered
-official. Use of any other values may result in incompatible implementations
-that will require subsequent breaking changes.
-
 *Allowed Values*
 {% for value_details in field['allowed_values'] %}
 * <<ecs-{{ field['dashed_name'] }}-{{ value_details['name'] }},{{ value_details['name'] }}>>