Update .tools/validation/schema/example_schema.yaml

Co-authored-by: Laren-AWS <[email protected]>

.tools/validation/schema/example_schema.yaml

@@ -10,7 +10,7 @@ example:
   # Used in the TOC. TODO: Defaults to slug-to-title of the ID if not provided. Overwritten by aws-doc-sdk-example when merging.
   title_abbrev: str(upper_start=True, no_end_punc=True, required=False)
   # String label categories. Categories inferred by cross-service with multiple services, and can be whatever else it wants. Controls where in the TOC it appears. Overwritten by aws-doc-sdk-example when merging.
-  category: str(required=False, upper_start=True, no_end_punc=True, required=False)
+  category: str(upper_start=True, no_end_punc=True, required=False)
   # Link to additional topic places. Overwritten by aws-doc-sdk-example when merging.
   guide_topic: include('guide_topic', required=False) # TODO Make this a list or a single.
   # TODO how to add a language here and require it in sdks_schema. TODO: Keys merged by aws-doc-sdk-example when merging.