Remove extra word (#3964)

* Remove extra word

Fixes #3963

* Update docs/999-big-list-of-options.md

Co-authored-by: Lukas Taegert-Atkinson <lukastaegert@users.noreply.github.com>

docs/999-big-list-of-options.md

@@ -35,7 +35,7 @@ When given as a command line argument, it should be a comma-separated list of ID
 rollup -i src/main.js ... -e foo,bar,baz
 ```
 
-When providing a function, it is actually called with three parameters `(id, parent, isResolved)` that can give you more fine-grained control:
+When providing a function, it is called with three parameters `(id, parent, isResolved)` that can give you more fine-grained control:
 
 * `id` is the id of the module in question
 * `parent` is the id of the module doing the import