lshal: use pragma once

For simplicity when adding new files.

Bug: N/A
Test: N/A
Change-Id: Ia66e5da5ff680b9287c4431799a935b58de02307
diff --git a/cmds/lshal/PipeRelay.h b/cmds/lshal/PipeRelay.h
index 8dc3093..835016041 100644
--- a/cmds/lshal/PipeRelay.h
+++ b/cmds/lshal/PipeRelay.h
@@ -14,9 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef FRAMEWORKS_NATIVE_CMDS_LSHAL_PIPE_RELAY_H_
-
-#define FRAMEWORKS_NATIVE_CMDS_LSHAL_PIPE_RELAY_H_
+#pragma once
 
 #include <android-base/macros.h>
 #include <ostream>
@@ -53,6 +51,3 @@
 
 }  // namespace lshal
 }  // namespace android
-
-#endif  // FRAMEWORKS_NATIVE_CMDS_LSHAL_PIPE_RELAY_H_
-