Remove support for sr-SP (#20155)

- The language doesn't have >= 25% translation on crowdin and therefor
was automatically removed from Gitea.
- Ref: f91092453e

custom/conf/app.example.ini

@@ -2113,7 +2113,7 @@ PATH =
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; The first locale will be used as the default if user browser's language doesn't match any locale in the list.
-;LANGS = en-US,zh-CN,zh-HK,zh-TW,de-DE,fr-FR,nl-NL,lv-LV,ru-RU,uk-UA,ja-JP,es-ES,pt-BR,pt-PT,pl-PL,bg-BG,it-IT,fi-FI,tr-TR,cs-CZ,sr-SP,sv-SE,ko-KR,el-GR,fa-IR,hu-HU,id-ID,ml-IN
+;LANGS = en-US,zh-CN,zh-HK,zh-TW,de-DE,fr-FR,nl-NL,lv-LV,ru-RU,uk-UA,ja-JP,es-ES,pt-BR,pt-PT,pl-PL,bg-BG,it-IT,fi-FI,tr-TR,cs-CZ,sv-SE,ko-KR,el-GR,fa-IR,hu-HU,id-ID,ml-IN
 ;NAMES = English,简体中文,繁體中文（香港）,繁體中文（台灣）,Deutsch,Français,Nederlands,Latviešu,Русский,Українська,日本語,Español,Português do Brasil,Português de Portugal,Polski,Български,Italiano,Suomi,Türkçe,Čeština,Српски,Svenska,한국어,Ελληνικά,فارسی,Magyar nyelv,Bahasa Indonesia,മലയാളം
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -999,7 +999,7 @@ Default templates for project boards:
 
 ## i18n (`i18n`)
 
-- `LANGS`: **en-US,zh-CN,zh-HK,zh-TW,de-DE,fr-FR,nl-NL,lv-LV,ru-RU,uk-UA,ja-JP,es-ES,pt-BR,pt-PT,pl-PL,bg-BG,it-IT,fi-FI,tr-TR,cs-CZ,sr-SP,sv-SE,ko-KR,el-GR,fa-IR,hu-HU,id-ID,ml-IN**:
+- `LANGS`: **en-US,zh-CN,zh-HK,zh-TW,de-DE,fr-FR,nl-NL,lv-LV,ru-RU,uk-UA,ja-JP,es-ES,pt-BR,pt-PT,pl-PL,bg-BG,it-IT,fi-FI,tr-TR,cs-CZ,sv-SE,ko-KR,el-GR,fa-IR,hu-HU,id-ID,ml-IN**:
      List of locales shown in language selector. The first locale will be used as the default if user browser's language doesn't match any locale in the list.
 - `NAMES`: **English,简体中文,繁體中文（香港）,繁體中文（台灣）,Deutsch,Français,Nederlands,Latviešu,Русский,Українська,日本語,Español,Português do Brasil,Português de Portugal,Polski,Български,Italiano,Suomi,Türkçe,Čeština,Српски,Svenska,한국어,Ελληνικά,فارسی,Magyar nyelv,Bahasa Indonesia,മലയാളം**: Visible names corresponding to the locales
 

modules/setting/i18n.go

@@ -26,7 +26,6 @@ var defaultI18nLangNames = []string{
 	"fi-FI", "Suomi",
 	"tr-TR", "Türkçe",
 	"cs-CZ", "Čeština",
-	"sr-SP", "Српски",
 	"sv-SE", "Svenska",
 	"ko-KR", "한국어",
 	"el-GR", "Ελληνικά",