Fix style

src/Compression/CompressionCodecDoubleDelta.cpp

@@ -21,6 +21,11 @@
 namespace DB
 {
 
+namespace ErrorCodes
+{
+    extern const int BAD_ARGUMENTS;
+}
+
 /** NOTE DoubleDelta is surprisingly bad name. The only excuse is that it comes from an academic paper.
   * Most people will think that "double delta" is just applying delta transform twice.
   * But in fact it is something more than applying delta transform twice.

src/Coordination/KeeperServer.cpp

@@ -45,7 +45,6 @@ namespace ErrorCodes
     extern const int SUPPORT_IS_DISABLED;
     extern const int LOGICAL_ERROR;
     extern const int INVALID_CONFIG_PARAMETER;
-    extern const int UNEXPECTED_ZOOKEEPER_ERROR;
 }
 
 using namespace std::chrono_literals;