misc: 清除冗余的代码

Reviewed-on: PostGuard/Canon#75
Co-authored-by: Lan_G <2911328695@qq.com>
Co-committed-by: Lan_G <2911328695@qq.com>

Canon.Core/Exceptions/SemanticException.cs

@@ -1,12 +0,0 @@
-namespace Canon.Core.Exceptions;
-/// <summary>
-/// 语义分析中引发的异常
-/// </summary>
-public class SemanticException : Exception
-{
-    public SemanticException() : base() { }
-
-    public SemanticException(string message) : base(message) { }
-
-    public SemanticException(string message, Exception innerException) : base(message, innerException) { }
-}