Remove outdated translation keys

Implementation changed and they're no longer needed

public/locales/en.json

@@ -822,19 +822,10 @@
     "settings": {
       "background_color": "Background color",
       "custom_filter": {
-        "brightness": {
+        "brightness": "Custom brightness",
-          "title": "Custom brightness",
+        "contrast": "Custom contrast",
-          "value": "$t(reader.settings.custom_filter.brightness.title)"
-        },
-        "contrast": {
-          "title": "Custom contrast",
-          "value": "$t(reader.settings.custom_filter.contrast.title)"
-        },
         "grayscale": "Grayscale",
-        "hue": {
+        "hue": "Custom hue",
-          "title": "Custom hue",
-          "value": "$t(reader.settings.custom_filter.hue.title)"
-        },
         "invert": "Invert",
         "rgba": {
           "alpha": "Alpha",
@@ -843,10 +834,7 @@
           "red": "Red",
           "title": "Custom color filters"
         },
-        "saturate": {
+        "saturate": "Custom saturate",
-          "title": "Custom saturate",
-          "value": "$t(reader.settings.custom_filter.saturate.title)"
-        },
         "sepia": "Sepia",
         "title": "Custom filter"
       },

src/modules/reader/components/settings/filters/ReaderSettingBrightness.tsx

@@ -29,13 +29,13 @@ export const ReaderSettingBrightness = ({
     return (
         <Stack>
             <CheckboxInput
-                label={t('reader.settings.custom_filter.brightness.title')}
+                label={t('reader.settings.custom_filter.brightness')}
                 checked={brightness.enabled}
                 onChange={(_, checked) => updateSetting('brightness', { ...brightness, enabled: checked }, true)}
             />
             {brightness.enabled && (
                 <SliderInput
-                    label={t('reader.settings.custom_filter.brightness.value')}
+                    label={t('reader.settings.custom_filter.brightness')}
                     value={brightness.value}
                     slotProps={{
                         slider: {

src/modules/reader/components/settings/filters/ReaderSettingContrast.tsx

@@ -28,13 +28,13 @@ export const ReaderSettingContrast = ({
     return (
         <Stack>
             <CheckboxInput
-                label={t('reader.settings.custom_filter.contrast.title')}
+                label={t('reader.settings.custom_filter.contrast')}
                 checked={contrast.enabled}
                 onChange={(_, checked) => updateSetting('contrast', { ...contrast, enabled: checked }, true)}
             />
             {contrast.enabled && (
                 <SliderInput
-                    label={t('reader.settings.custom_filter.contrast.value')}
+                    label={t('reader.settings.custom_filter.contrast')}
                     value={contrast.value}
                     slotProps={{
                         slider: {

src/modules/reader/components/settings/filters/ReaderSettingHue.tsx

@@ -28,13 +28,13 @@ export const ReaderSettingHue = ({
     return (
         <Stack>
             <CheckboxInput
-                label={t('reader.settings.custom_filter.hue.title')}
+                label={t('reader.settings.custom_filter.hue')}
                 checked={hue.enabled}
                 onChange={(_, checked) => updateSetting('hue', { ...hue, enabled: checked }, true)}
             />
             {hue.enabled && (
                 <SliderInput
-                    label={t('reader.settings.custom_filter.hue.value')}
+                    label={t('reader.settings.custom_filter.hue')}
                     value={hue.value}
                     slotProps={{
                         slider: {

src/modules/reader/components/settings/filters/ReaderSettingSaturate.tsx

@@ -28,13 +28,13 @@ export const ReaderSettingSaturate = ({
     return (
         <Stack>
             <CheckboxInput
-                label={t('reader.settings.custom_filter.saturate.title')}
+                label={t('reader.settings.custom_filter.saturate')}
                 checked={saturate.enabled}
                 onChange={(_, checked) => updateSetting('saturate', { ...saturate, enabled: checked }, true)}
             />
             {saturate.enabled && (
                 <SliderInput
-                    label={t('reader.settings.custom_filter.saturate.value')}
+                    label={t('reader.settings.custom_filter.saturate')}
                     value={saturate.value}
                     slotProps={{
                         slider: {