build, msvc: Drop duplicated common\url.cpp source file

It has been a part of SOURCE_FILES since bitcoin/bitcoin#29904

Author: hebasto

build_msvc/libbitcoin_common/libbitcoin_common.vcxproj.in

@@ -8,7 +8,6 @@
     <ConfigurationType>StaticLibrary</ConfigurationType>
   </PropertyGroup>
   <ItemGroup>
-    <ClCompile Include="..\..\src\common\url.cpp" />
 @SOURCE_FILES@
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />