Improve syntax

Co-authored-by: syeopite <[email protected]>

src/invidious.cr

@@ -248,11 +248,8 @@ Kemal.config.app_name = "Invidious"
 {% end %}
 
 Kemal.run do |config|
-  if CONFIG.socket_binding
-    socket_binding = CONFIG.socket_binding.not_nil!
-    if File.exists?(socket_binding.path)
-      File.delete(socket_binding.path)
-    end
+  if socket_binding = CONFIG.socket_binding
+File.delete?(socket_binding.path)
     # Create a socket and set its desired permissions
     server = UNIXServer.new(socket_binding.path)
     perms = socket_binding.permissions.to_i(base: 8)

src/invidious/config.cr

@@ -259,8 +259,7 @@ class Config
     end
 
     # Check if the socket configuration is valid
-    if config.socket_binding
-      sb = config.socket_binding.not_nil!
+    if sb = config.socket_binding
       if sb.path.ends_with?("/") || File.directory?(sb.path)
         puts "Config: The socket path " + sb.path + " must not be a directory!"
         exit(1)