Invert coupling from Core to Logging

SabreTools.Logging/Enums.cs

@@ -1,22 +1,13 @@
-using SabreTools.Core;
-
-namespace SabreTools.Logging
+namespace SabreTools.Logging
 {
     /// <summary>
     /// Severity of the logging statement
     /// </summary>
     public enum LogLevel
     {
-        [Mapping("verbose")]
         VERBOSE = 0,
-
-        [Mapping("user")]
         USER,
-
-        [Mapping("warning")]
         WARNING,
-
-        [Mapping("error")]
         ERROR,
     }
 }