Remove unused variables from fs/proc/base.c

When removing the explicit task_struct->pid usage I found that
proc_readfd_common() and proc_pident_readdir() get this field, but do not
use it at all.  So this cleanup is a cheap help with the task_struct->pid
isolation.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/proc/base.c

@@ -1519,7 +1519,7 @@ static int proc_readfd_common(struct file * filp, void * dirent,
 	struct dentry *dentry = filp->f_path.dentry;
 	struct inode *inode = dentry->d_inode;
 	struct task_struct *p = get_proc_task(inode);
-	unsigned int fd, tid, ino;
+	unsigned int fd, ino;
 	int retval;
 	struct files_struct * files;
 	struct fdtable *fdt;
@@ -1528,7 +1528,6 @@ static int proc_readfd_common(struct file * filp, void * dirent,
 	if (!p)
 		goto out_no_task;
 	retval = 0;
-	tid = p->pid;
 
 	fd = filp->f_pos;
 	switch (fd) {
@@ -1763,7 +1762,6 @@ static int proc_pident_readdir(struct file *filp,
 		const struct pid_entry *ents, unsigned int nents)
 {
 	int i;
-	int pid;
 	struct dentry *dentry = filp->f_path.dentry;
 	struct inode *inode = dentry->d_inode;
 	struct task_struct *task = get_proc_task(inode);
@@ -1776,7 +1774,6 @@ static int proc_pident_readdir(struct file *filp,
 		goto out_no_task;
 
 	ret = 0;
-	pid = task->pid;
 	i = filp->f_pos;
 	switch (i) {
 	case 0: