Refactoring codes for removing buffer size options. An some other changes...

Former-commit-id: 10b57cc1a27446ade3c444217341e9651e89cdce

pkg/goutils/slices.go

@@ -0,0 +1,24 @@
+package goutils
+
+
+func Contains[T comparable](arr []T, x T) bool {
+	for _, v := range arr {
+		if v == x {
+			return true
+		}
+	}
+	return false
+}
+
+func LookFor[T comparable](arr []T, x T) int {
+	for i, v := range arr {
+		if v == x {
+			return i
+		}
+	}
+	return -1
+}
+
+func RemoveIndex[T comparable](s []T, index int) []T {
+    return append(s[:index], s[index+1:]...)
+}