Clang-format drivetrain

Change-Id: I9e20a52ca97b968046969fa2c2e7f42b1fcbb1c3
diff --git a/frc971/control_loops/drivetrain/polydrivetrain.cc b/frc971/control_loops/drivetrain/polydrivetrain.cc
index a0d374e..b52b67f 100644
--- a/frc971/control_loops/drivetrain/polydrivetrain.cc
+++ b/frc971/control_loops/drivetrain/polydrivetrain.cc
@@ -2,8 +2,6 @@
 
 namespace frc971 {
 namespace control_loops {
-namespace drivetrain {
-
-}  // namespace drivetrain
+namespace drivetrain {}  // namespace drivetrain
 }  // namespace control_loops
 }  // namespace frc971