Clean up header includes

 - Remove <errno.h> because related functions are in util.c now
 - Remove corresponding <string.h> if not used otherwise

components/battery.c

@@ -1,5 +1,4 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <stdio.h>
 #include <string.h>
 

components/cpu.c

@@ -1,5 +1,4 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <stdio.h>
 #include <string.h>
 

components/disk.c

@@ -1,7 +1,5 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <stdio.h>
-#include <string.h>
 #include <sys/statvfs.h>
 
 #include "../util.h"

components/hostname.c

@@ -1,7 +1,5 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <stdio.h>
-#include <string.h>
 #include <unistd.h>
 
 #include "../util.h"

components/ip.c

@@ -1,5 +1,4 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <ifaddrs.h>
 #include <netdb.h>
 #include <stdio.h>

components/kernel_release.c

@@ -1,8 +1,6 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <sys/utsname.h>
 #include <stdio.h>
-#include <string.h>
 
 #include "../util.h"
 

components/num_files.c

@@ -1,6 +1,5 @@
 /* See LICENSE file for copyright and license details. */
 #include <dirent.h>
-#include <errno.h>
 #include <stdio.h>
 #include <string.h>
 

components/run_command.c

@@ -1,5 +1,4 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <stdio.h>
 #include <string.h>
 

components/swap.c

@@ -1,5 +1,4 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>

components/temperature.c

@@ -16,9 +16,7 @@
 		return bprintf("%d", temp / 1000);
 	}
 #elif defined(__OpenBSD__)
-	#include <errno.h>
 	#include <stdio.h>
-	#include <string.h>
 	#include <sys/time.h> /* before <sys/sensors.h> for struct timeval */
 	#include <sys/sensors.h>
 	#include <sys/sysctl.h>

components/uptime.c

@@ -29,8 +29,6 @@ format(int uptime)
 		return format(uptime);
 	}
 #elif defined(__OpenBSD__)
-	#include <errno.h>
-	#include <string.h>
 	#include <sys/sysctl.h>
 	#include <sys/time.h>
 

components/user.c

@@ -1,8 +1,6 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <pwd.h>
 #include <stdio.h>
-#include <string.h>
 #include <sys/types.h>
 #include <unistd.h>
 

components/volume.c

@@ -1,5 +1,4 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <string.h>

components/wifi.c

@@ -1,5 +1,4 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <ifaddrs.h>
 #include <stdio.h>
 #include <string.h>