Remove duplicate typedef.

macdice · macdice · commit 34399a670a1c · 2021-04-09T00:39:12.000+12:00
Thinko in commit 323cbe7, per complaint from BF animal locust's older GCC compiler.
diff --git a/src/include/replication/logical.h b/src/include/replication/logical.h
@@ -29,8 +29,6 @@ typedef void (*LogicalOutputPluginWriterUpdateProgress) (struct LogicalDecodingC
 														 TransactionId xid
 );
 
-typedef struct LogicalDecodingContext LogicalDecodingContext;
-
 typedef bool (*LogicalDecodingXLogPageReadCB)(XLogReaderState *ctx);
 
 typedef struct LogicalDecodingContext
