Bug 1256584 - Remove AC_PROG_INSTALL and AC_PROG_LN_S. r=gps

We don't use the result of those tests:
- INSTALL is set in config.mk to something derived from NSINSTALL.
- LN_S is never used.

js/src/old-configure.in

@@ -451,9 +451,6 @@ AC_SUBST(INTEL_CXX)
 dnl ========================================================
 dnl Checks for programs.
 dnl ========================================================
-AC_PROG_INSTALL
-AC_PROG_LN_S
-
 AC_MSG_CHECKING([for tar archiver])
 AC_CHECK_PROGS(TAR, gnutar gtar tar, "")
 if test -z "$TAR"; then

old-configure.in

@@ -688,9 +688,6 @@ AC_SUBST(MOZ_MSVC_STL_WRAP_RAISE)
 dnl ========================================================
 dnl Checks for programs.
 dnl ========================================================
-AC_PROG_INSTALL
-AC_PROG_LN_S
-
 if test -z "$COMPILE_ENVIRONMENT"; then
     NSINSTALL_BIN='$(PYTHON) $(MOZILLA_DIR)/config/nsinstall.py'
 fi