feat: rm useless fields from settings

config/default.toml

@@ -1,8 +1,5 @@
 debug = true
 source_code = "https://github.com/realaravinth/dumbserve"
-commercial = false
-allow_demo = true
-allow_registration = true
 
 [server]
 # Please set a unique value, your mCaptcha instance's security depends on this being 

src/settings.rs

@@ -92,12 +92,10 @@ impl Files {
 #[derive(Debug, Clone, Deserialize)]
 pub struct Settings {
     pub debug: bool,
-    pub commercial: bool,
     //    pub database: Database,
     pub server: Server,
     pub source_code: String,
     pub files: Files,
-    pub allow_registration: bool,
 }
 
 #[cfg(not(tarpaulin_include))]