Remove language-specific callouts for x-fern-default

 (#5233)

Co-authored-by: fern-api[bot] <115122769+fern-api[bot]@users.noreply.github.com>

Author: fern-api[bot]

fern/products/api-def/openapi/extensions/default.mdx

@@ -6,11 +6,7 @@ description: Use `x-fern-default` to set client-side default values for path, he
 
 The `x-fern-default` extension lets you specify a client-side default value for a path, header, or query parameter, including headers defined under [`x-fern-global-headers`](/learn/api-definitions/openapi/extensions/global-headers). When present, the generated SDK makes the parameter optional and automatically sends the default value if the caller omits it. `x-fern-default` supports `string` and `boolean` values; other types (such as numbers) are ignored.
 
-This is useful for pinning an API version header or a region path parameter while still allowing callers to override the value.
-
-<Note title="Supported languages">
-  `x-fern-default` is supported for TypeScript, Python, Go, Java, C#, PHP, and Ruby SDKs.
-</Note>
+This is useful for pinning an API version header or a region path parameter while still allowing callers to override the value. `x-fern-default` is supported across all SDK languages.
 
 ## Path parameters
 

fern/products/sdks/deep-dives/generated-sdk.mdx

@@ -49,7 +49,7 @@ When you define webhooks in your API spec, Fern automatically [generates utiliti
 
 ## Default parameter values
 
-You can configure [default values](/learn/api-definitions/openapi/extensions/default-values) for path, header, and query parameters, including headers defined under [`x-fern-global-headers`](/learn/api-definitions/openapi/extensions/global-headers). The SDK makes those parameters optional and sends the default when the caller doesn't provide one — useful for things like pinning an API version header or default region. Supported in TypeScript, Python, Go, Java, C#, PHP, and Ruby SDKs.
+You can configure [default values](/learn/api-definitions/openapi/extensions/default-values) for path, header, and query parameters, including headers defined under [`x-fern-global-headers`](/learn/api-definitions/openapi/extensions/global-headers). The SDK makes those parameters optional and sends the default when the caller doesn't provide one — useful for things like pinning an API version header or default region.
 
 ## Customization options