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[cc1] Remove nextsym()

It is not longer needed because we already use another hash
table for cpp symbols.

--- a/cc1/lex.c

+++ b/cc1/lex.c

@@ -499,12 +499,6 @@

 	if ((sym = lookup(NS_CPP, yytext, NOALLOC)) != NULL) {

 		if (!disexpand && expand(begin, sym))

 			return next();

-		/*

-		 * it is not a correct macro call, so try to find

-		 * another definition.

-		 */

-		if (lexmode != CPPMODE)

-			sym = nextsym(sym, namespace);

 	}

 	sym = lookup(namespace, yytext, ALLOC);

 	yylval.sym = sym;

--- a/cc1/symbol.c

+++ b/cc1/symbol.c

@@ -277,28 +277,6 @@

 }

 Symbol *

-nextsym(Symbol *sym, int ns)

-{

-	char *s, *t, c;

-	Symbol *p;

-

-	/*

-	 * This function is only called when a macro with parameters

-	 * is called without them.

-	 *      #define x(y) ((y) + 1)

-	 *      int x = x(y);

-	 */

-	s = sym->name;

-	c = *s;

-	for (p = sym->hash; p; p = p->hash) {

-		t = p->name;

-		if (c == *t && !strcmp(s, t))

-			return p;

-	}

-	return allocsym(ns, s);

-}

-

-Symbol *

 install(int ns, Symbol *sym)

 {

 	if (sym->flags & SDECLARED) {