fix(i18n): drop orphan TerminalPane.minimumContrast entries that broke main static analysis

The 7 auto.components.settings.TerminalPane.minimumContrast.* entries added by #18126 have zero call sites; the shipped component reads settings.contrast.*. Because the runtime-required catalog classifies any key with no literal-default call site as required, the orphans broke 'Verify runtime-required localization catalog' on main and red-lit every PR in the repo.

Deleting them is the root-cause fix: regenerating would instead add dead strings to the boot bundle. On main+delete, --fix regenerates a byte-identical catalog and the CI step exits 0.

Merged with 'test / tests node 24 3/8' red: that failure is an unrelated main break from the #19542/#19551 collision, not from this change.

src/renderer/src/i18n/locales/en.json

@@ -8627,15 +8627,6 @@
             "fastDescription": "Extra multiplier while scrolling with a modifier key.",
             "tui": "TUI",
             "tuiDescription": "Discrete wheel reports for full-screen terminal apps."
-          },
-          "minimumContrast": {
-            "title": "Minimum Contrast Ratio",
-            "description": "Lifts terminal foreground colors that sit too close to the background. Leave blank for automatic, or set 1 to render program colors exactly as sent.",
-            "automatic": "Automatic: {{light}} on light backgrounds, {{dark}} on dark.",
-            "disabled": "Correction off. Programs that rely on low contrast, like Powerline separators, render as sent.",
-            "pinned": "Targets {{ratio}}:1 contrast for foreground colors, where possible.",
-            "placeholder": "Auto",
-            "suffix": "blank = automatic, 1 = off"
           }
         },
         "TerminalSettingsPreview": {