libast: cleanup: remove unused pathprobe() function

This function was part of the defunct internal AT&T AST build
system. Grepping the ast-open-archive repo shows it was used by
nmake(1), probe(1), and libpp (pp(3)), the latter being a library
supporting the AST implementation of cpp(1), the C preprocessor.
According to the documentation, the pathprobe function yields the
path to probe(1) information for arbitrary language processors.

There's not going to be any interest in this in the future as we
are going to keep our version of the build system small and
self-contained, so we can get rid.

src/lib/libast/Mamfile

@@ -1089,19 +1089,6 @@ make install virtual
 			exec - compile ${<}
 		done
 
-		make pathprobe.o
-			make path/pathprobe.c
-				prev ast_api.h
-				make include/proc.h implicit
-					prev include/ast.h
-				done
-				prev include/ls.h
-				prev include/error.h
-				prev include/ast.h
-			done
-			exec - compile ${<} -DHOSTTYPE=\""${mam_cc_HOSTTYPE}"\"
-		done
-
 		make pathrepl.o
 			make path/pathrepl.c
 				prev ast_api.h
@@ -1389,7 +1376,9 @@ make install virtual
 		make systrace.o
 			make misc/systrace.c
 				prev include/debug.h
-				prev include/proc.h
+				make include/proc.h implicit
+					prev include/ast.h
+				done
 				prev include/error.h
 				prev include/ast.h
 			done

src/lib/libast/features/api

@@ -8,7 +8,7 @@ api ast 20120411 cmdopen
 
 api ast 20110505 cmdopen
 
-api ast 20100601 pathaccess pathcanon pathcat pathkey pathpath pathprobe pathrepl
+api ast 20100601 pathaccess pathcanon pathcat pathkey pathpath pathrepl
 
 api ast 20000308 sfkeyprintf
 

src/lib/libast/features/map.c

@@ -201,8 +201,6 @@ main(void)
 	printf("#define pathpath	_ast_pathpath\n");
 	printf("#undef	pathposix\n");
 	printf("#define pathposix	_ast_pathposix\n");
-	printf("#undef	pathprobe\n");
-	printf("#define pathprobe	_ast_pathprobe\n");
 	printf("#undef	pathprog\n");
 	printf("#define pathprog	_ast_pathprog\n");
 	printf("#undef	pathrepl\n");

src/lib/libast/include/ast.h

@@ -365,8 +365,6 @@ extern size_t		pathnative(const char*, char*, size_t);
 extern char*		pathpath(char*, const char*, const char*, int);
 extern char*		pathpath_20100601(const char*, const char*, int, char*, size_t);
 extern size_t		pathposix(const char*, char*, size_t);
-extern char*		pathprobe(char*, char*, const char*, const char*, const char*, int);
-extern char*		pathprobe_20100601(const char*, const char*, const char*, int, char*, size_t, char*, size_t);
 extern size_t		pathprog(const char*, char*, size_t);
 extern char*		pathrepl(char*, const char*, const char*);
 extern char*		pathrepl_20100601(char*, size_t, const char*, const char*);

src/lib/libast/man/path.3

@@ -54,7 +54,6 @@ int       pathicase(const char* \fIpath\fP);
 char*     pathkey(char* \fIkey\fP, char* \fIattr\fP, const char* \fIlang\fP, const char* \fIpath\fP);
 char*     pathnext(char* \fIpath\fP, char* \fIextra\fP, long* \fIvisits\fP);
 char*     pathpath(char* \fIpath\fP, const char* \fIp\fP, const char* \fIa\fP, int \fImode\fP);
-char*     pathprobe(char* \fIpath\fP, char* \fIattr\fP, const char* \fIlang\fP, const char* \fItool\fP, const char* \fIproc\fP, int \fIop\fP);
 char*     pathrepl(char* \fIpath\fP, const char* \fImatch\fP, const char* \fIreplace\fP);
 int       pathsetlink(const char* \fItext\fP, char* \fIname\fP);
 char*     pathshell(void);
@@ -305,43 +304,6 @@ then
 .I ../p
 is searched for.
 .PP
-.L pathprobe
-generates in
-.I path
-the full path name of the
-.I tool
-specific
-.IR probe (1)
-information file for the
-.I lang
-language processor
-.IR proc .
-If
-.I "path == 0"
-then space is allocated via
-.IR malloc (3).
-Probe attribute
-.I name=value
-pairs are copied into
-.I attr
-if
-.IR "attr != 0" .
-.I op
-may be one of:
-.TP
-.B \-1
-return the path name with no access checks or generation
-.TP
-.B 0
-message emitted information must be generated via
-.IR probe (1)
-.TP
-.B 1
-no message emitted information must be probed via
-.IR probe (1)
-.PP
-0 is returned if the information does not exist and cannot be generated.
-.PP
 .L pathrepl
 does an in-place replacement of the first occurrence of
 .I /match/