Revert "follow-up on the util/recover.c change earlier"

This reverts commit 54e984c70c.

util/dlb.sln

@@ -1,33 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.30907.101
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{911E67C6-3D85-4FCE-B560-20A9C3E3FF48}") = "dlb", "dlb.exe", "{69FE91F4-4A3D-4E77-8BD7-D5D11FFEFFA1}"
-	ProjectSection(DebuggerProjectSystem) = preProject
-		PortSupplier = 00000000-0000-0000-0000-000000000000
-		Executable = C:\Users\MichaelAllison\Documents\github\NHsource\util\dlb.exe
-		RemoteMachine = ALLISONPC2
-		StartingDirectory = C:\Users\MichaelAllison\Documents\github\NHsource\util
-		Arguments = v f ../src/nhdat370
-		Environment = Default
-		LaunchingEngine = 00000000-0000-0000-0000-000000000000
-		UseLegacyDebugEngines = No
-		LaunchSQLEngine = No
-		AttachLaunchAction = No
-	EndProjectSection
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Release|x86 = Release|x86
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{69FE91F4-4A3D-4E77-8BD7-D5D11FFEFFA1}.Release|x86.ActiveCfg = Release|x86
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {D14F79FF-4FDB-4035-944E-EA73CEDF5244}
-	EndGlobalSection
-EndGlobal

util/recover.c

@@ -22,10 +22,6 @@ extern int vms_creat(const char *, unsigned);
 extern int vms_open(const char *, int, unsigned);
 #endif /* VMS */
 
-#ifndef nhUse
-#define nhUse(arg) (void)(arg)
-#endif
-
 int restore_savefile(char *);
 void set_levelfile_name(int);
 int open_levelfile(int);