Revert "triedb/pathdb: for test"

This reverts commit 2868af3.

Author: jsvisa

triedb/pathdb/database.go

@@ -47,7 +47,7 @@ const (
 	// Too large buffer will cause the system to pause for a long
 	// time when write happens. Also, the largest batch that pebble can
 	// support is 4GB, node will panic if batch size exceeds this limit.
-	maxBufferSize = 64 * 1024 * 1024
+	maxBufferSize = 256 * 1024 * 1024
 
 	// defaultBufferSize is the default memory allowance of node buffer
 	// that aggregates the writes from above until it's flushed into the