Retire 'stupid' merge strategy

As pointed out by Linus, this strategy tries to take the best merge
base, but 'recursive' just does it better. If one needs something more
than 'resolve' then he/she should really use 'recursive' and not
'stupid'.

Cf. Message-ID: <alpine.LFD.1.10.0807030947360.18105@woody.linux-foundation.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

.gitignore

@@ -75,7 +75,6 @@ git-merge-one-file
 git-merge-ours
 git-merge-recursive
 git-merge-resolve
-git-merge-stupid
 git-merge-subtree
 git-mergetool
 git-mktag

Makefile

@@ -241,7 +241,6 @@ SCRIPT_SH += git-merge-octopus.sh
 SCRIPT_SH += git-merge-one-file.sh
 SCRIPT_SH += git-merge-resolve.sh
 SCRIPT_SH += git-merge.sh
-SCRIPT_SH += git-merge-stupid.sh
 SCRIPT_SH += git-mergetool.sh
 SCRIPT_SH += git-parse-remote.sh
 SCRIPT_SH += git-pull.sh
@@ -1429,7 +1428,7 @@ check-docs::
 	do \
 		case "$$v" in \
 		git-merge-octopus | git-merge-ours | git-merge-recursive | \
-		git-merge-resolve | git-merge-stupid | git-merge-subtree | \
+		git-merge-resolve | git-merge-subtree | \
 		git-fsck-objects | git-init-db | \
 		git-?*--?* ) continue ;; \
 		esac ; \

git-merge-stupid.sh

-#!/bin/sh
-#
-# Copyright (c) 2005 Linus Torvalds
-#
-# Resolve two trees, 'stupid merge'.
-
-# The first parameters up to -- are merge bases; the rest are heads.
-bases= head= remotes= sep_seen=
-for arg
-do
-	case ",$sep_seen,$head,$arg," in
-	*,--,)
-		sep_seen=yes
-		;;
-	,yes,,*)
-		head=$arg
-		;;
-	,yes,*)
-		remotes="$remotes$arg "
-		;;
-	*)
-		bases="$bases$arg "
-		;;
-	esac
-done
-
-# Give up if we are given two or more remotes -- not handling octopus.
-case "$remotes" in
-?*' '?*)
-	exit 2 ;;
-esac
-
-# Find an optimum merge base if there are more than one candidates.
-case "$bases" in
-?*' '?*)
-	echo "Trying to find the optimum merge base."
-	G=.tmp-index$$
-	best=
-	best_cnt=-1
-	for c in $bases
-	do
-		rm -f $G
-		GIT_INDEX_FILE=$G git read-tree -m $c $head $remotes \
-			 2>/dev/null ||	continue
-		# Count the paths that are unmerged.
-		cnt=`GIT_INDEX_FILE=$G git ls-files --unmerged | wc -l`
-		if test $best_cnt -le 0 -o $cnt -le $best_cnt
-		then
-			best=$c
-			best_cnt=$cnt
-			if test "$best_cnt" -eq 0
-			then
-				# Cannot do any better than all trivial merge.
-				break
-			fi
-		fi
-	done
-	rm -f $G
-	common="$best"
-	;;
-*)
-	common="$bases"
-	;;
-esac
-
-git update-index --refresh 2>/dev/null
-git read-tree -u -m $common $head $remotes || exit 2
-echo "Trying simple merge."
-if result_tree=$(git write-tree  2>/dev/null)
-then
-	exit 0
-else
-	echo "Simple merge failed, trying Automatic merge."
-	if git-merge-index -o git-merge-one-file -a
-	then
-		exit 0
-	else
-		exit 1
-	fi
-fi