fix(sdk): fix builder pattern to actually work with default values

In previous versions the builder pattern required all values to be set.
This has not been fixed, so that default values are allowed.

crates/dagger-core/src/schema.rs

@@ -12,13 +12,3 @@ pub async fn get_schema() -> eyre::Result<IntrospectionResponse> {
 
     Ok(schema)
 }
-
-#[cfg(test)]
-mod tests {
-    use super::get_schema;
-
-    #[tokio::test]
-    async fn can_get_schema() {
-        let _ = get_schema().await.unwrap();
-    }
-}