Removed GoogleProvider setter methods.

src/classes/tts/providers/GoogleProvider.js

@@ -1,8 +1,6 @@
 const googleTTS = require('google-tts-api');
 const AbstractProvider = require('./AbstractProvider');
 const Payload = require('../Payload');
-const { GoogleProviderError } = require('../../../errors');
-const languages = require('../../../../provider-data/google_languages.json');
 
 /**
  * A concrete TTS provider for the Google Translate API TTS.
@@ -40,32 +38,6 @@ class GoogleProvider extends AbstractProvider {
 
     return `(TTS): Playing googleTTS for ${sentence} with language ${lang} with ${speed} speed in guild ${guild.name}.`;
   }
-
-  setLang(newLang) {
-    if (!languages[newLang]) {
-      throw new GoogleProviderError('Invalid language!', GoogleProviderError.REASON.invalid);
-    }
-
-    if (this.lang === newLang) {
-      throw new GoogleProviderError(`Language is already set to ${newLang}!`, GoogleProviderError.REASON.same);
-    }
-
-    this.lang = newLang;
-    return languages[this.lang].name;
-  }
-
-  getLang() {
-    return languages[this.lang].name;
-  }
-
-  setSpeed(newSpeed) {
-    if (newSpeed !== 'normal' && newSpeed !== 'slow') {
-      throw new GoogleProviderError('Invalid speed!', GoogleProviderError.REASON.invalid);
-    }
-
-    this.speed = newSpeed;
-    return newSpeed;
-  }
 }
 
 GoogleProvider.NAME = 'Google';