feat(pci): remove monthly.postpaid references

[y4nnL]

Question	Answer
Branch?	develop
Bug fix?	no
New feature?	yes
Breaking change?	no
Tickets	Fix #TAPC-1349
License	BSD 3-Clause

• [X] Try to keep pull requests small so they can be easily reviewed.
• [X] Commits are signed-off
• [ ] ~~Only FR translations have been updated~~
• [X] Branch is up-to-date with target branch
• [X] Lint has passed locally
• [X] Standalone app was ran and tested locally
• [X] Ticket reference is mentioned in linked commits (internal only)
• [ ] ~~Breaking change is mentioned in relevant commits~~