Remove hashmap.cc in vcproj files.

vsprojects/libprotobuf-lite.vcproj

@@ -239,10 +239,6 @@
 				RelativePath="..\src\google\protobuf\generated_message_util.cc"
 				>
 			</File>
-			<File
-				RelativePath="..\src\google\protobuf\stubs\hash.cc"
-				>
-			</File>
 			<File
 				RelativePath="..\src\google\protobuf\message_lite.cc"
 				>

vsprojects/libprotobuf.vcproj

@@ -343,10 +343,6 @@
 				RelativePath="..\src\google\protobuf\io\gzip_stream.cc"
 				>
 			</File>
-			<File
-				RelativePath="..\src\google\protobuf\stubs\hash.cc"
-				>
-			</File>
 			<File
 				RelativePath="..\src\google\protobuf\compiler\importer.cc"
 				>