git_remote_helpers: remove little used Python library

When it was originally added, the git_remote_helpers library was used as
part of the tests of the remote-helper interface, but since commit
fc407f9 (Add new simplified git-remote-testgit, 2012-11-28) a simple
shell script is used for this.

A search on Ohloh [1] indicates that this library isn't used by any
external projects and even the Python remote helpers in contrib/ don't
use this library, so it is only used by its own test suite.

Since this is the only Python library in Git, removing it will make
packaging easier as the Python scripts only need to be installed for one
version of Python, whereas the library should be installed for all
available versions.

[1] http://code.ohloh.net/search?s=%22git_remote_helpers%22

Signed-off-by: John Keeping <john@keeping.me.uk>
Acked-by: Sverre Rabbelier <srabbelier@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Makefile

@@ -488,11 +488,9 @@ SCRIPT_PERL += git-relink.perl
 SCRIPT_PERL += git-send-email.perl
 SCRIPT_PERL += git-svn.perl
 
-SCRIPT_PYTHON += git-remote-testpy.py
 SCRIPT_PYTHON += git-p4.py
 
 NO_INSTALL += git-remote-testgit
-NO_INSTALL += git-remote-testpy
 
 # Generated files for scripts
 SCRIPT_SH_GEN = $(patsubst %.sh,%,$(SCRIPT_SH))
@@ -1669,9 +1667,6 @@ ifndef NO_TCLTK
 endif
 ifndef NO_PERL
 	$(QUIET_SUBDIR0)perl $(QUIET_SUBDIR1) PERL_PATH='$(PERL_PATH_SQ)' prefix='$(prefix_SQ)' localedir='$(localedir_SQ)' all
-endif
-ifndef NO_PYTHON
-	$(QUIET_SUBDIR0)git_remote_helpers $(QUIET_SUBDIR1) PYTHON_PATH='$(PYTHON_PATH_SQ)' prefix='$(prefix_SQ)' all
 endif
 	$(QUIET_SUBDIR0)templates $(QUIET_SUBDIR1) SHELL_PATH='$(SHELL_PATH_SQ)' PERL_PATH='$(PERL_PATH_SQ)'
 
@@ -1840,12 +1835,7 @@ ifndef NO_PYTHON
 $(SCRIPT_PYTHON_GEN): GIT-CFLAGS GIT-PREFIX GIT-PYTHON-VARS
 $(SCRIPT_PYTHON_GEN): % : %.py
 	$(QUIET_GEN)$(RM) $@ $@+ && \
-	INSTLIBDIR=`MAKEFLAGS= $(MAKE) -C git_remote_helpers -s \
-		--no-print-directory prefix='$(prefix_SQ)' DESTDIR='$(DESTDIR_SQ)' \
-		instlibdir` && \
 	sed -e '1s|#!.*python|#!$(PYTHON_PATH_SQ)|' \
-	    -e 's|\(os\.getenv("GITPYTHONLIB"\)[^)]*)|\1,"@@INSTLIBDIR@@")|' \
-	    -e 's|@@INSTLIBDIR@@|'"$$INSTLIBDIR"'|g' \
 	    $< >$@+ && \
 	chmod +x $@+ && \
 	mv $@+ $@
@@ -2352,9 +2342,6 @@ ifndef NO_PERL
 	$(MAKE) -C perl prefix='$(prefix_SQ)' DESTDIR='$(DESTDIR_SQ)' install
 	$(MAKE) -C gitweb install
 endif
-ifndef NO_PYTHON
-	$(MAKE) -C git_remote_helpers prefix='$(prefix_SQ)' DESTDIR='$(DESTDIR_SQ)' install
-endif
 ifndef NO_TCLTK
 	$(MAKE) -C gitk-git install
 	$(MAKE) -C git-gui gitexecdir='$(gitexec_instdir_SQ)' install
@@ -2501,9 +2488,6 @@ clean: profile-clean coverage-clean
 ifndef NO_PERL
 	$(MAKE) -C gitweb clean
 	$(MAKE) -C perl clean
-endif
-ifndef NO_PYTHON
-	$(MAKE) -C git_remote_helpers clean
 endif
 	$(MAKE) -C templates/ clean
 	$(MAKE) -C t/ clean