Retire git-export.

git-export was done as a concept example on how easy it is to export
the git data to something else. It's much less powerful than any
number of trivial one-liner scripts now, and real exporters would not
ever use git-export.

It's obviously much less powerful than "git-whatchanged", or just
about any combination of git-rev-list + git-diff-tree.

Signed-off-by: Junio C Hamano <junkio@cox.net>

.gitignore

@@ -24,7 +24,6 @@ git-diff-helper
 git-diff-index
 git-diff-stages
 git-diff-tree
-git-export
 git-fetch
 git-fetch-pack
 git-format-patch

Documentation/git.txt

@@ -118,9 +118,6 @@ gitlink:git-diff-stages[1]::
 gitlink:git-diff-tree[1]::
 	Compares the content and mode of blobs found via two tree objects
 
-gitlink:git-export[1]::
-	Exports each commit and a diff against each of its parents
-
 gitlink:git-fsck-objects[1]::
 	Verifies the connectivity and validity of the objects in the database
 	Previously this command was known as git-fsck-cache.

Makefile

@@ -103,7 +103,7 @@ PROGRAMS = \
 	git-checkout-index git-clone-pack git-commit-tree \
 	git-convert-objects git-diff-files \
 	git-diff-helper git-diff-index git-diff-stages \
-	git-diff-tree git-export git-fetch-pack git-fsck-objects \
+	git-diff-tree git-fetch-pack git-fsck-objects \
 	git-hash-object git-init-db \
 	git-local-fetch git-ls-files git-ls-tree git-merge-base \
 	git-merge-index git-mktag git-pack-objects git-patch-id \