remove some warnings in unused code

Prebuild/src/Core/FatalException.cs

@@ -71,15 +71,6 @@ namespace Prebuild.Core
         {
         }
 
-        /// <summary>
-        /// 
-        /// </summary>
-        /// <param name="info"></param>
-        /// <param name="context"></param>
-        protected FatalException(SerializationInfo info, StreamingContext context) : base(info, context)
-        {
-        }
-
         #endregion
     }
 }

Prebuild/src/Core/UnknownLanguageException.cs

@@ -51,13 +51,5 @@ namespace Prebuild.Core
         {
         }
 
-        /// <summary>
-        /// 
-        /// </summary>
-        /// <param name="info"></param>
-        /// <param name="context"></param>
-        protected UnknownLanguageException(SerializationInfo info, StreamingContext context) : base(info, context)
-        {
-        }
     }
 }

Prebuild/src/Core/WarningException.cs

@@ -70,15 +70,6 @@ namespace Prebuild.Core
         {
         }
 
-        /// <summary>
-        /// 
-        /// </summary>
-        /// <param name="info"></param>
-        /// <param name="context"></param>
-        protected WarningException(SerializationInfo info, StreamingContext context) : base(info, context)
-        {
-        }
-
         #endregion
     }
 }