dthelp: Remove define M_PROTO that was always turned on (for all platforms) that enabled ANSI not K&R function prototypes

cde/programs/dthelp/parser/pass2/util/inctest.c

@@ -30,23 +30,11 @@
 #endif
 #include "basic.h"
 
-void m_err1(
-#if defined(M_PROTO)
-  const char *text, const char *arg
-#endif
-  ) ;
+void m_err1(const char *text, const char *arg);
 
-void m_exit(
-#if defined(M_PROTO)
-  int status
-#endif
-  ) ;
+void m_exit(int status);
 
-void m_inctest(
-#if defined(M_PROTO)
-  int *count, int limit, char *message
-#endif
-  ) ;
+void m_inctest(int *count, int limit, char *message);
 
 /* Increment a count and test against a limit */
 void m_inctest(count, limit, message)