Scale back global variables

Some of the global variables were either not used anymore or only used
in the listing code.

src/xkbcomp/listing.c

@@ -144,6 +144,9 @@ static char **mapOnly;
 
 static Listing *list = NULL;
 
+static unsigned verboseLevel;
+static unsigned dirsToStrip;
+
 /***====================================================================***/
 
 int

src/xkbcomp/xkbcomp.h

@@ -113,7 +113,6 @@ typedef struct _ParseCommon
 #define	CreateKeyNames(x)	((x)->flags&AutoKeyNames)
 
 extern unsigned warningLevel;
-extern unsigned optionalParts;
 
 typedef struct _IncludeStmt
 {
@@ -367,10 +366,6 @@ CompileSymbols(XkbFile *file, XkbcDescPtr xkb, unsigned merge);
 #define	WantFullNames	(1<<3)
 #define	ListRecursive	(1<<4)
 
-extern char *rootDir;
-extern unsigned verboseLevel;
-extern unsigned dirsToStrip;
-
 extern Bool AddListing(char * /* file */ ,
                        char *   /* map */
     );