build: No longer check for ocamldep -one-line and -all options

These were added to ocamldep in Jan 2012, over 10 years ago.  They
were not present in RHEL 6, but we don't care about that now.

(cherry picked from virt-v2v commit f6108bbd661d3e922d07b47f00daa901ab846e59)

m4/guestfs-ocaml.m4

@@ -77,26 +77,6 @@ if test "x$OCAMLC" != "xno"; then
 fi
 AC_SUBST([OCAML_RUNTIME_VARIANT_PIC_OPTION])
 
-dnl Check if ocamldep has options -all and -one-line (not present in RHEL 6).
-AC_MSG_CHECKING([if ocamldep has the ‘-all’ option])
-if ocamldep -all >&AS_MESSAGE_LOG_FD 2>&1; then
-    AC_MSG_RESULT([yes])
-    OCAMLDEP_ALL="-all"
-else
-    AC_MSG_RESULT([no])
-    OCAMLDEP_ALL=""
-fi
-AC_SUBST([OCAMLDEP_ALL])
-AC_MSG_CHECKING([if ocamldep has the ‘-one-line’ option])
-if ocamldep -one-line >&AS_MESSAGE_LOG_FD 2>&1; then
-    AC_MSG_RESULT([yes])
-    OCAMLDEP_ONE_LINE="-one-line"
-else
-    AC_MSG_RESULT([no])
-    OCAMLDEP_ONE_LINE=""
-fi
-AC_SUBST([OCAMLDEP_ONE_LINE])
-
 have_Hivex_OPEN_UNSAFE=no
 if test "x$enable_daemon" = "xyes"; then
     OCAML_PKG_hivex=no

ocaml-dep.sh.in

@@ -65,7 +65,7 @@ echo >> $output-t
 # 3. Generated _config.ml in srcdir: Rewrite to builddir
 # 4. Other object files below abs_top_srcdir: rewrite to corresponding builddir
 # 5. Eliminate "./" prefix
-@OCAMLFIND@ ocamldep @OCAMLDEP_ALL@ @OCAMLDEP_ONE_LINE@ $includes "$@" \
+@OCAMLFIND@ ocamldep -all -one-line $includes "$@" \
     | sed \
           -e "s,@abs_top_srcdir@/${subdir},.,g" \
           -e "s,\B${srcdir_re}/\\([^ ]*[.]\\)\\(cm[^ ]*\\|o\\),\\1\\2,g" \