Remove obsolete TODO comment (#911)

**Stack**:
- #912
- #911 ⬅


⚠️ *Part of a stack created by [spr](https://github.com/ejoffe/spr). Do
not merge manually using the UI - doing so may have unexpected results.*

Signed-off-by: Marek Kaput <[email protected]>

scarb/src/resolver/mod.rs

@@ -194,8 +194,6 @@ async fn rewrite_dependency_source_id(
 mod tests {
     //! These tests largely come from Elixir's `hex_solver` test suite.
 
-    // TODO(mkaput): Remove explicit path source IDs, when we will support default registry.
-
     use anyhow::Result;
     use indoc::indoc;
     use itertools::Itertools;