remove duplicate includes

The following command reports that some header files are included twice:

   $ git grep '#include' '*.c' | sort | uniq -cd

Remove the second #include line in each case, as it has no effect.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/blame.c

@@ -10,7 +10,6 @@
 #include "builtin.h"
 #include "config.h"
 #include "color.h"
-#include "builtin.h"
 #include "environment.h"
 #include "gettext.h"
 #include "hex.h"

builtin/log.c

@@ -24,7 +24,6 @@
 #include "diff-merges.h"
 #include "revision.h"
 #include "log-tree.h"
-#include "builtin.h"
 #include "oid-array.h"
 #include "tag.h"
 #include "reflog-walk.h"

builtin/pack-objects.c

@@ -44,7 +44,6 @@
 #include "blob.h"
 #include "tree.h"
 #include "path-walk.h"
-#include "trace2.h"
 
 /*
  * Objects we are going to pack are collected in the `to_pack` structure.

commit.c

@@ -31,7 +31,6 @@
 #include "parse.h"
 #include "object-file.h"
 #include "object-file-convert.h"
-#include "prio-queue.h"
 
 static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **);
 

object-file-convert.c

@@ -6,7 +6,6 @@
 #include "hex.h"
 #include "repository.h"
 #include "hash.h"
-#include "hash.h"
 #include "object.h"
 #include "loose.h"
 #include "commit.h"

protocol-caps.c

@@ -4,7 +4,6 @@
 #include "hex.h"
 #include "pkt-line.h"
 #include "hash.h"
-#include "hex.h"
 #include "object.h"
 #include "odb.h"
 #include "repository.h"

setup.c

@@ -25,7 +25,6 @@
 #include "trace.h"
 #include "trace2.h"
 #include "worktree.h"
-#include "exec-cmd.h"
 
 static int inside_git_dir = -1;
 static int inside_work_tree = -1;