Checkout: Remove fallback translations for line item sublabels

[sirbrillig]

Proposed Changes

This is a follow-up to #80987 to remove the fallback translations now that the full translations are complete.

Testing Instructions

None should be required as this just removes fallbacks.

[matticbot]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-80311

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-80311&env=jetpack

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~106 bytes removed 📉 [gzipped])

name                               parsed_size           gzip_size
plans                                   -749 B  (-0.1%)     -106 B  (-0.0%)
jetpack-connect                         -749 B  (-0.1%)     -106 B  (-0.0%)
jetpack-cloud-pricing                   -749 B  (-0.1%)     -106 B  (-0.1%)
jetpack-cloud-plugin-management         -749 B  (-0.1%)     -106 B  (-0.0%)
jetpack-cloud-partner-portal            -749 B  (-0.1%)     -106 B  (-0.1%)
jetpack-cloud-features-comparison       -749 B  (-0.1%)     -106 B  (-0.1%)
jetpack-cloud-agency-dashboard          -749 B  (-0.1%)     -106 B  (-0.0%)
checkout                                -749 B  (-0.0%)     -106 B  (-0.0%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Async-loaded Components (~106 bytes removed 📉 [gzipped])

name                                              parsed_size           gzip_size
async-load-masterbar-cart-masterbar-cart-wrapper       -749 B  (-0.8%)     -106 B  (-0.4%)
async-load-calypso-my-sites-checkout-modal             -749 B  (-0.1%)     -106 B  (-0.0%)
async-load-calypso-blocks-editor-checkout-modal        -749 B  (-0.1%)     -106 B  (-0.0%)

React components that are loaded lazily, when a certain part of UI is displayed for the first time.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.