tools: moveconfig: remove redundant else: after sys.exit()

Nesting by "else:" is not generally useful after such statements
as return, break, sys.exit(), etc.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>

tools/moveconfig.py

@@ -623,9 +623,7 @@ class Slot:
                                                 COLOR_LIGHT_CYAN, errout)
             if self.options.exit_on_error:
                 sys.exit("Exit on error.")
-            else:
-                # If --exit-on-error flag is not set,
-                # skip this board and continue.
+            # If --exit-on-error flag is not set, skip this board and continue.
             # Record the failed board.
             self.failed_boards.append(self.defconfig)
             self.state = STATE_IDLE