go: remove unused parameter

Task: The Number of Beautiful Subsets

Signed-off-by: Matej Focko <me@mfocko.xyz>

go/the-number-of-beautiful-subsets.go

@@ -7,20 +7,20 @@ import (
 func beautifulSubsets(nums []int, k int) int {
 	seen := make(map[int]int)
 
-	var dfs func(int, int) int
-	dfs = func(lastNum, i int) int {
+	var dfs func(int) int
+	dfs = func(i int) int {
 		// BASE: Got to the end of the slice
 		if i >= len(nums) {
 			return 1
 		}
 
 		// Initialize with skipping the current number
-		foundSubsets := dfs(lastNum, i+1)
+		foundSubsets := dfs(i + 1)
 
 		// Check if we can include the current number
 		if seen[nums[i]-k] == 0 && seen[nums[i]+k] == 0 {
 			seen[nums[i]] += 1
-			foundSubsets += dfs(nums[i], i+1)
+			foundSubsets += dfs(i + 1)
 			seen[nums[i]] -= 1
 		}
 
@@ -28,5 +28,5 @@ func beautifulSubsets(nums []int, k int) int {
 	}
 
 	slices.Sort(nums)
-	return dfs(nums[0]-k-1, 0) - 1
+	return dfs(0) - 1
 }