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/algo.rs

@@ -2,7 +2,7 @@ pub mod visit;
 
 use itertools::Itertools;
 
-use crate::{SyntaxNode, TextRange, TextUnit, AstNode, Direction, SyntaxToken, SyntaxElement};
+use crate::{AstNode, Direction, SyntaxElement, SyntaxNode, SyntaxToken, TextRange, TextUnit};
 
 pub use rowan::TokenAtOffset;