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/parsing/text_token_source.rs

@@ -1,10 +1,7 @@
-use ra_parser::TokenSource;
 use ra_parser::Token as PToken;
+use ra_parser::TokenSource;
 
-use crate::{
-    SyntaxKind::EOF, TextRange, TextUnit,
-    parsing::lexer::Token,
-};
+use crate::{parsing::lexer::Token, SyntaxKind::EOF, TextRange, TextUnit};
 
 pub(crate) struct TextTokenSource<'t> {
     text: &'t str,