Delete only-number command

Author: KajizukaTaichi

src/main.rs

@@ -1063,12 +1063,6 @@ impl Executor {
                 }
             }
 
-            // Is string include only number
-            "only-number" => match self.pop_stack().get_string().trim().parse::<f64>() {
-                Ok(_) => self.stack.push(Type::Bool(true)),
-                Err(_) => self.stack.push(Type::Bool(false)),
-            },
-
             // Get memory information
             "mem" => {
                 let mut list: Vec<Type> = Vec::new();