fix(build): drop dublicate props: Copyright, Authors, Description in Mapster project

Author: DocSvartz

src/Mapster/Mapster.csproj

@@ -1,9 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <Description>A fast, fun and stimulating object to object mapper.  Kind of like AutoMapper, just simpler and way, way faster.</Description>
-    <Copyright>Copyright (c) 2016 Chaowlert Chaisrichalermpol, Eric Swann</Copyright>
-    <Authors>chaowlert;eric_swann</Authors>
     <TargetFrameworks>netstandard2.0;net10.0;net9.0;net8.0</TargetFrameworks>
     <AssemblyName>Mapster</AssemblyName>
     <Description>A fast, fun and stimulating object to object mapper. Kind of like AutoMapper, just simpler and way, way faster.</Description>