Courtesy of the website ozgrid.com I found code which could delete  a module

Dim vbCom As Object
Set vbCom = Application.VBE.ActiveVBProject.VBComponents

vbcom.delete vbcom.item("Module2")

But I have no idea how you are going to be able to use it within a module  as
VBProject does not expose its passwords properties to the outside for obvious
reasons.

I have code that will delete  the modules
(I remove the modules  and protect the worksheet when I send the final
report for distribution),
but how do you plan to determine the failed password  attempts?

Plus, what good is it to delete a single module?
Once one or more modules are removed, won't execution results become
unpredictable? If the person fat-fingers the password the first time,
but corrects his mistake the second, he'll be missing a module  and
probably needs to start over anyway...

Well.. if you can figure out the failed password, here is what I use:

Dim VBComp As VBIDE.VBComponent
Dim VBComps As VBIDE.VBComponents
For Each VBComp In VBComps
'MsgBox VBComp.name
Select Case VBComp.Type
Case vbext_ct_StdModule, vbext_ct_MSForm, _
vbext_ct_ClassModule
VBComps.Remove VBComp
Case Else
With VBComp.CodeModule
.DeleteLines 1, .CountOfLines
End With
End Select
Next VBComp

No matter if you password  protect a VBA module  or a workbook or a
worksheet, unfortunately there is no way to check if a wrong  password
is entered.