refactor: simplify tty_nr decoding for major device 4

Remove unnecessary condition check in the match arm for virtual console
terminals. Both branches returned the same value, so the condition was
redundant. Addresses review feedback from PR uutils#533.

Author: naoNao89

src/uu/pgrep/src/process.rs

@@ -116,14 +116,7 @@ impl TryFrom<u64> for Teletype {
 
         match major {
             // Virtual console terminals (/dev/tty1, /dev/tty2, etc.)
-            4 => {
-                if minor == 0 {
-                    // /dev/tty0 is the current virtual console
-                    Ok(Self::Tty(0))
-                } else {
-                    Ok(Self::Tty(minor))
-                }
-            }
+            4 => Ok(Self::Tty(minor)),
             // Serial terminals (/dev/ttyS0, /dev/ttyS1, etc.)
             5 => Ok(Self::TtyS(minor)),
             // Pseudo-terminals (/dev/pts/0, /dev/pts/1, etc.)