Remove redundant store APIs for Boards: (#22968)

- getBlocksWithParent
- getBlocksWithParentAndType
- getBlocksWithType
- getBlocksForBoard

server/boards/model/block.go

@@ -176,7 +176,7 @@ type QueryBlocksOptions struct {
 	ParentID  string    // if not empty then filter for blocks belonging to specified parent
 	BlockType BlockType // if not empty and not `TypeUnknown` then filter for records of specified block type
 	Page      int       // page number to select when paginating
-	PerPage   int       // number of blocks per page (default=-1, meaning unlimited)
+	PerPage   int       // number of blocks per page (default=0, meaning unlimited)
 }
 
 // QuerySubtreeOptions are query options that can be passed to GetSubTree methods.