shared: include what we use

The next step of a general cleanup of our includes. This one mostly
adds missing includes but there are a few removals as well.

src/shared/install-printf.c

@@ -19,15 +19,18 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <stdlib.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
 
-#include "alloc-util.h"
 #include "formats-util.h"
 #include "install-printf.h"
+#include "install.h"
+#include "macro.h"
 #include "specifier.h"
 #include "unit-name.h"
 #include "user-util.h"
-#include "util.h"
 
 static int specifier_prefix_and_instance(char specifier, void *data, void *userdata, char **ret) {
         UnitFileInstallInfo *i = userdata;