Power Query - Remove current file from the query

So the final, correct code, finally is this

let
    /*we need to list the files in the same folder as your workbook
    1. Begin by Naming a cell "Filepath" (caution it's case sensitive)
    2. In this cell, indicate the following formula : =LEFT(CELL("filename",$A$1),FIND("[",CELL("filename",$A$1),1)-1)
    3. Indicate the following Source in your query : 
        Source = Folder.Files(Excel.CurrentWorkbook(){[Name="Filepath"]}[Content]{0}[Column1])
    in
        Source 
To remove the current workbook : 
1.to get the filename, create a cell "Filename" 
2. indicate the following formula : =MID(CELL("filename",$A$1),FIND("[",CELL("filename",$A$1),1)+1,FIND("]",CELL("filename",$A$1),1)-FIND("[",CELL("filename",$A$1),1)-1)
3. Filter your table : 
 #"Filtered Rows" = Table.SelectRows(Source, each [Name] <> Filename
        */
    Source = Folder.Files(Excel.CurrentWorkbook(){[Name="Filepath"]}[Content]{0}[Column1]),
    #"Filtered Rows" = Table.SelectRows(Source, each ([Extension] = ".xlsx") and ([Name] <> FilenameQ) and  ([Attributes]?[Hidden]? <> true))