Do not export funcs for enums

Author: MrAlias

semconv/helpers.j2

@@ -66,7 +66,7 @@ const (
 {%- endmacro -%}
 
 {%- macro generate_funcs(group) -%}
-{%- for attribute in group.attributes if not attribute.deprecated %}
+{%- for attribute in group.attributes if not attribute is enum %}
 {#- TODO: Handle template attributes. #}
 {%- if not attribute.type is template_type %}