Revert "revert: feat: Allow to skip submitting empty values in form data (#5830)" (#6227)

This reverts commit 1b6cb7d1bf.

src/core/utils.js

@@ -956,3 +956,15 @@ function b64toB64UrlEncoded(str) {
     .replace(/\//g, "_")
     .replace(/=/g, "")
 }
+
+export const isEmptyValue = (value) => {
+  if (!value) {
+    return true
+  }
+
+  if (isImmutable(value) && value.isEmpty()) {
+    return true
+  }
+
+  return false
+}