If you really want to do this one at a time use this script.
Double click on cell in column ("A") of the row you want to delete.
Script will delete and shiftup columns A and B
This is an auto sheet event script
Your Workbook must be Macro enabled
To install this code:
Right-click on the sheet tab
Select View Code from the pop-up context menu
Paste the code in the VBA edit window
Code:
Private Sub Worksheet_BeforeDoubleClick(ByVal Target As Range, Cancel As Boolean)
If Target.Column = 1 Then
Cancel = True
Dim ans As Long
ans = Target.Row
Range(Cells(ans, 1), Cells(ans, 2)).Delete xlShiftUp
End If
End Sub