fix(graphql-model-transformer): update wordings

Author: sundersc

src/pages/gen1/[platform]/build-a-backend/graphqlapi/data-modeling/index.mdx

@@ -1143,7 +1143,7 @@ Declaring custom Query, Mutation, and/or Subscription with the same field names
 </Callout>
 
 <Callout info>
-The 'extend' keyword can only be applied to GraphQL Queries, Mutations, and Subscriptions. Amplify directives are not supported on these extended type definitions.
+Amplify directives are not supported on the extended type definitions.
 </Callout>
 
 ## How it works