Simplify

With BSD locks we don't have to guard against reading our own
temproots.

src/libstore/gc.cc

@@ -221,8 +221,6 @@ void LocalStore::findTempRoots(FDs & fds, Roots & tempRoots, bool censor)
         //FDPtr fd(new AutoCloseFD(openLockFile(path, false)));
         //if (*fd == -1) continue;
 
-        if (path != fnTempRoots) {
-
         /* Try to acquire a write lock without blocking.  This can
            only succeed if the owning process has died.  In that case
            we don't care about its temporary roots. */
@@ -239,8 +237,6 @@ void LocalStore::findTempRoots(FDs & fds, Roots & tempRoots, bool censor)
         debug(format("waiting for read lock on '%1%'") % path);
         lockFile(fd->get(), ltRead, true);
 
-        }
-
         /* Read the entire file. */
         string contents = readFile(fd->get());