content rating shouldn't ever be a phrase (#1653)

ErsatzTV.Infrastructure.Tests/Search/SearchQueryParserTests.cs

@@ -14,7 +14,6 @@ public class SearchQueryParserTests
         [TestCase("tag:\"Will Smith\"", "tag:\"will smith\"")]
         [TestCase("library_id:4", "library_id:4")]
         [TestCase("content_rating:\"TV-14\"", "content_rating:TV-14")]
-        [TestCase("content_rating:\"test PHRASE\"", "content_rating:\"test PHRASE\"")]
         public void Test(string input, string expected)
         {
             Query result = SearchQueryParser.ParseQuery(input);