Remove invalid sign check (#3328)

* no sign check

* revert check

Author: zardoy

lib/plugins/blocks.js

@@ -455,9 +455,10 @@ function inject (bot, { version, storageBuilder, hideErrors }) {
       bot.emit('error', new Error('too many lines for sign text'))
       return
     }
+
     for (let i = 0; i < lines.length; ++i) {
-      if (lines[i].length > 15) {
-        bot.emit('error', new Error('signs have max line length 15'))
+      if (lines[i].length > 45) {
+        bot.emit('error', new Error('Signs have a maximum of 45 characters per line'))
         return
       }
     }