Remove contribution range from PDF statement

[mrose17]

Fixes #6896

Auditor: @bsclifton

Test Plan:

1. Generate a PDF contribution statement
2. Verify that the contribution range you see here as the last line isn't there any more.

[willy-b]

note: this does give a range if the current contribution is not your first one (then it is not redundant). not disagreeing with change, just giving context :-).

[NejcZdovc]

Maybe keep it and only display it when range is available?

[mrose17]

@NejcZdovc - you've convinced me. i'm going to withdraw this issue and the PR. could you make the line more useful? i'm also not really keen on the design placement either, but that's another matter!

[NejcZdovc]

@willy-b can you tackle this?

[willy-b]

@NejcZdovc sure, happy to!

[willy-b]

@mrose17 , I fixed this as per @NejcZdovc's suggestion (https://github.com/willy-b/browser-laptop/commit/a510c87d1598b6e75043bf2924e36643355e4e7e).

Example: Two consecutive statements

• where 1st has no date range (since 1st payment):
  

• 2nd does have a date range (begins with date of last statement):
  

should I open a new PR against #6896?

[willy-b]

note: @mrose17 responded to my question in a comment on my commit (https://github.com/willy-b/browser-laptop/commit/a510c87d1598b6e75043bf2924e36643355e4e7e#commitcomment-20667505):
"thanks! go ahead and submit an issue/PR for this fix and we should be good."

so, opening a separate PR