chore(lint): remove custom min and max functions

These are now available as builtins.

textinput/textinput.go

@@ -758,20 +758,6 @@ func clamp(v, low, high int) int {
 	return min(high, max(low, v))
 }
 
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}
-
-func max(a, b int) int {
-	if a > b {
-		return a
-	}
-	return b
-}
-
 // Deprecated.
 
 // Deprecated: use cursor.Mode.