How can i remove the table relationship link?
Have a look at the link.
Depends on what you want to do. Join or Concatenate?
Looking at your data model, I would guess you should concatenate. Hence, put a "Concatenate" keyword right before your second Load statement:
Load * From Table1.... ;
Load * From Table2 ...;
Do you not want to be completely disconnected from each other? If yes, may be you need to use Qualify statement before them to force them to have different names:
Retrieving data ...