Clean duplicate translation key

htdocs/langs/en_US/admin.lang

@@ -1529,8 +1529,6 @@ DetailLevel=Level (-1:top menu, 0:header menu, >0 menu and sub menu)
 ModifMenu=Menu change
 DeleteMenu=Delete menu entry
 ConfirmDeleteMenu=Are you sure you want to delete menu entry <b>%s</b> ?
-DeleteLine=Delete line
-ConfirmDeleteLine=Are you sure you want to delete this line ?
 FailedToInitializeMenu=Failed to initialize menu
 ##### Tax #####
 TaxSetup=Taxes, social or fiscal taxes and dividends module setup

htdocs/langs/en_US/main.lang

@@ -724,6 +724,9 @@ ViewList=List view
 Mandatory=Mandatory
 Hello=Hello
 Sincerely=Sincerely
+DeleteLine=Delete line
+ConfirmDeleteLine=Are you sure you want to delete this line ?
+
 # Week day
 Monday=Monday
 Tuesday=Tuesday

htdocs/langs/en_US/trips.lang

@@ -28,8 +28,6 @@ AnyOtherInThisListCanValidate=Person to inform for validation.
 TripSociete=Information company
 TripSalarie=Informations user
 TripNDF=Informations expense report
-DeleteLine=Delete a line of the expense report
-ConfirmDeleteLine=Are you sure you want to delete this line ?
 PDFStandardExpenseReports=Standard template to generate a PDF document for expense report
 ExpenseReportLine=Expense report line
 TF_OTHER=Other