allow rustfmt to reorder imports

This wasn't a right decision in the first place, the feature flag was
broken in the last rustfmt release, and syntax highlighting of imports
is more important anyway

crates/ra_syntax/src/fuzz.rs

@@ -1,4 +1,4 @@
-use crate::{SourceFile, validation, TextUnit, TextRange, AstNode};
+use crate::{validation, AstNode, SourceFile, TextRange, TextUnit};
 use ra_text_edit::AtomTextEdit;
 use std::str::{self, FromStr};