refactor: remove audio - i18n

#1944

Author: jo-elimu

src/main/webapp/WEB-INF/i18n/errors_en.properties

@@ -23,7 +23,6 @@ NotNull.valueSampa=X-SAMPA value must be provided
 TooLow.versionCode=The versionCode must be larger than the previous one
 packageName.mismatch=The packageName does not match.
 typeMismatch.applicationVersion.bytes=The file must be an APK file
-typeMismatch.audio.bytes=Valid audio formats: OGG/MP3/WAV
 typeMismatch.image.bytes=Valid image formats: GIF/JPG/PNG
 typeMismatch.video.bytes=Valid video formats: M4V/MP4
 typeMismatch.thumbnail=Valid thumbnail format: PNG

src/main/webapp/WEB-INF/i18n/messages_en.properties

@@ -1,7 +1,6 @@
 about=About
 add=Add
 add.application=Add application
-add.audio=Add audio
 add.email=Add e-mail
 add.emoji=Add emoji
 add.image=Add image
@@ -24,8 +23,6 @@ aragon.dao=Aragon DAO
 are.you.a.developer=Are you a developer?
 assessment.events=Assessment events
 attribution.url=Attribution URL
-audio=Audio
-audios=Audios
 blog=Blog
 chapter=Chapter
 comment=Comment
@@ -49,14 +46,12 @@ distribute.the.software=Distribute the software
 domain=Domain
 download=Download
 download.and.test.the.software=Download & test the software
-do.you.approve.quality.of.this.audio?=Do you approve the quality of this audio?
 do.you.approve.quality.of.this.letter.sound.correspondence?=Do you approve the quality of this letter-sound correspondence?
 do.you.approve.quality.of.this.storybook?=Do you approve the quality of this storybook?
 do.you.approve.quality.of.this.word?=Do you approve the quality of this word?
 do.you.approve.quality.of.this.number?=Do you approve the quality of this number?
 edit=Edit
 edit.application=Edit application
-edit.audio=Edit audio
 edit.email=Edit e-mail
 edit.emoji=Edit emoji
 edit.image=Edit image