[Mod]remove blank lines

tools/ci/check_all.py

@@ -72,4 +72,4 @@ def check_linter():
 if __name__ == "__main__":
     if not check_all():
         exit(1)
-    exit(0)
+    exit(0)

vnpy/gateway/ctp/ctp_gateway.py

@@ -767,4 +767,4 @@ class CtpTdApi(TdApi):
     def close(self):
         """"""
         if self.connect_status:
-            self.exit()
+            self.exit()