Remove no-longer-used MasterVersionInfo property

It had been used for a now-deprecated TeamCity API call.

Change-Id: If2526ddb6ce05e6f6e0b76954887c916ac70e465

Author: papeh

Build/mkall.targets

@@ -278,7 +278,6 @@
 	</Target>
 
 	<PropertyGroup>
-		<MasterVersionInfo>$(fwrt)/Src/MasterVersionInfo.txt</MasterVersionInfo>
 		<TeamCityUrl>https://build.palaso.org/</TeamCityUrl>
 
 		<!-- Chorus_Win32masterContinuous is the master branch build of Chorus for Windows development. Update when appropriate. -->