Code clean-up.
* dp/remove-duplicated-header-inclusion:
do not include the same header twice
#include "run-command.h"
#include "parse-options.h"
#include "sigchain.h"
-#include "transport.h"
#include "submodule.h"
#include "connected.h"
#include "argv-array.h"
#include "cache.h"
#include "string-list.h"
#include "run-command.h"
-#include "string-list.h"
#include "commit.h"
#include "trailer.h"
/*
#include "commit.h"
#include "diff.h"
#include "revision.h"
-#include "quote.h"
#include "remote.h"
#include "string-list.h"
#include "thread-utils.h"
#include "cache.h"
#include "userdiff.h"
-#include "cache.h"
#include "attr.h"
static struct userdiff_driver *drivers;