Remove unneccesary exception code

InvalidConfigException is used in exactly one place, and isn't meant to be used anywhere else (except in exception handling code)

Oh yeah, and there was also a leftover using in FanRPMConf that got removed too

YAMDCC.Config/FanRPMConf.cs

@@ -14,7 +14,6 @@
 // You should have received a copy of the GNU General Public License along with
 // YAMDCC. If not, see <https://www.gnu.org/licenses/>.
 
-using System;
 using System.Xml.Serialization;
 
 namespace YAMDCC.Config

YAMDCC.Config/InvalidConfigException.cs

@@ -15,48 +15,18 @@
 // YAMDCC. If not, see <https://www.gnu.org/licenses/>.
 
 using System;
-using System.Runtime.Serialization;
 
 namespace YAMDCC.Config
 {
     /// <summary>
     /// The exception thrown when an invalid <see cref="YAMDCC_Config"/> is loaded.
     /// </summary>
-    [Serializable]
     public sealed class InvalidConfigException : Exception
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="InvalidConfigException" /> class.
         /// </summary>
         public InvalidConfigException()
-            : base("The fan control config was not in an expected format.") { }
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="InvalidConfigException"/>
-        /// class with a specified error message.
-        /// </summary>
-        /// <param name="message">
-        /// The message that describes the error.
-        /// </param>
-        public InvalidConfigException(string message)
-            : base(message) { }
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="InvalidConfigException"/>
-        /// class with a specified error message and a reference to the inner
-        /// exception that is the cause of this exception.
-        /// </summary>
-        /// <param name="message">
-        /// The error message that explains the reason for the exception.
-        /// </param>
-        /// <param name="innerException">
-        /// The exception that is the cause of the current exception,
-        /// or <c>null</c> if no inner exception is specified.
-        /// </param>
-        public InvalidConfigException(string message, Exception innerException)
-            : base(message, innerException) { }
-
-        private InvalidConfigException(SerializationInfo info, StreamingContext context)
-            : base(info, context) { }
+            : base("The YAMDCC config was not in the expected format.") { }
     }
 }