remove some checks which are not needed after the recent ptmalloc2 changes

This commit was SVN r21042.

configure.ac

@@ -778,7 +778,7 @@ OMPI_CHECK_FUNC_LIB([dirname], [gen])
 # Darwin doesn't need -lm, as it's a symlink to libSystem.dylib
 OMPI_CHECK_FUNC_LIB([ceil], [m])
 
-AC_CHECK_FUNCS([asprintf snprintf vasprintf vsnprintf openpty isatty getpwuid fork waitpid execve pipe ptsname setsid mmap mallopt tcgetpgrp posix_memalign strsignal sysconf syslog regcmp regexec regfree _NSGetEnviron socketpair strncpy_s _strdup usleep mkfifo])
+AC_CHECK_FUNCS([asprintf snprintf vasprintf vsnprintf openpty isatty getpwuid fork waitpid execve pipe ptsname setsid mmap tcgetpgrp posix_memalign strsignal sysconf syslog regcmp regexec regfree _NSGetEnviron socketpair strncpy_s _strdup usleep mkfifo])
 
 # On some hosts, htonl is a define, so the AC_CHECK_FUNC will get
 # confused.  On others, it's in the standard library, but stubbed with

opal/mca/memory/ptmalloc2/configure.m4

@@ -73,12 +73,6 @@ AC_DEFUN([MCA_memory_ptmalloc2_CONFIG],[
                            [memory_ptmalloc2_happy="yes"],
                            [memory_ptmalloc2_happy="no"])])
 
-    AS_IF([test "$memory_ptmalloc2_happy" = "yes"],
-          [# check for link.h (for _DYNAMIC symbol)
-           AC_CHECK_HEADER([link.h],
-                           [memory_ptmalloc2_happy="yes"],
-                           [memory_ptmalloc2_happy="no"])])
-
     AS_IF([test "$memory_ptmalloc2_happy" = "yes"],
           [# check for init hook symbol
            AC_CHECK_DECL([__malloc_initialize_hook],