Remove some needless parentheses now reported on nightly.

Author: ehuss

crates/cargo-test-support/src/paths.rs

@@ -127,7 +127,7 @@ impl CargoPathExt for Path {
 
     fn move_in_time<F>(&self, travel_amount: F)
     where
-        F: Fn(i64, u32) -> ((i64, u32)),
+        F: Fn(i64, u32) -> (i64, u32),
     {
         if self.is_file() {
             time_travel(self, &travel_amount);
@@ -137,7 +137,7 @@ impl CargoPathExt for Path {
 
         fn recurse<F>(p: &Path, bad: &Path, travel_amount: &F)
         where
-            F: Fn(i64, u32) -> ((i64, u32)),
+            F: Fn(i64, u32) -> (i64, u32),
         {
             if p.is_file() {
                 time_travel(p, travel_amount)
@@ -151,7 +151,7 @@ impl CargoPathExt for Path {
 
         fn time_travel<F>(path: &Path, travel_amount: &F)
         where
-            F: Fn(i64, u32) -> ((i64, u32)),
+            F: Fn(i64, u32) -> (i64, u32),
         {
             let stat = t!(path.symlink_metadata());