tree-wide: Remove unused includes (#39023)

src/basic/ansi-color.c

@@ -3,7 +3,6 @@
 #include <stdlib.h>
 
 #include "ansi-color.h"
-#include "log.h"
 #include "process-util.h"
 #include "string-table.h"
 #include "string-util.h"

src/basic/env-file.c

@@ -6,7 +6,6 @@
 #include "alloc-util.h"
 #include "env-file.h"
 #include "env-util.h"
-#include "errno-util.h"
 #include "escape.h"
 #include "fd-util.h"
 #include "fileio.h"

src/basic/fd-util.c

@@ -20,7 +20,6 @@
 #include "parse-util.h"
 #include "path-util.h"
 #include "process-util.h"
-#include "socket-util.h"
 #include "sort-util.h"
 #include "stat-util.h"
 #include "stdio-util.h"

src/basic/filesystems.c

@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include "filesystems-gperf.h"
-#include "nulstr-util.h"
 #include "stat-util.h"
 #include "string-util.h"