Fix GitHub's license detection

LICENSE

@@ -1,4 +1,3 @@
-plugin-yml
 Copyright (c) 2017 Minecrell <https://github.com/Minecrell>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy

src/main/kotlin/net/minecrell/pluginyml/GeneratePluginDescription.kt

@@ -1,5 +1,4 @@
 /*
- * plugin-yml
  * Copyright (c) 2017 Minecrell <https://github.com/Minecrell>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy

src/main/kotlin/net/minecrell/pluginyml/InvalidPluginDescriptionException.kt

@@ -1,5 +1,4 @@
 /*
- * plugin-yml
  * Copyright (c) 2017 Minecrell <https://github.com/Minecrell>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy

src/main/kotlin/net/minecrell/pluginyml/PlatformPlugin.kt

@@ -1,5 +1,4 @@
 /*
- * plugin-yml
  * Copyright (c) 2017 Minecrell <https://github.com/Minecrell>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy

src/main/kotlin/net/minecrell/pluginyml/bukkit/BukkitPlugin.kt

@@ -1,5 +1,4 @@
 /*
- * plugin-yml
  * Copyright (c) 2017 Minecrell <https://github.com/Minecrell>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy

src/main/kotlin/net/minecrell/pluginyml/bukkit/BukkitPluginDescription.kt

@@ -1,5 +1,4 @@
 /*
- * plugin-yml
  * Copyright (c) 2017 Minecrell <https://github.com/Minecrell>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy

src/main/kotlin/net/minecrell/pluginyml/bungee/BungeePlugin.kt

@@ -1,5 +1,4 @@
 /*
- * plugin-yml
  * Copyright (c) 2017 Minecrell <https://github.com/Minecrell>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy

src/main/kotlin/net/minecrell/pluginyml/bungee/BungeePluginDescription.kt

@@ -1,5 +1,4 @@
 /*
- * plugin-yml
  * Copyright (c) 2017 Minecrell <https://github.com/Minecrell>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy