Revert "feat: handle unprotected session expiration (#747)"

This reverts commit 8db549f6f6.

app/assets/javascripts/views/challenge_modal/challenge_modal.tsx

@@ -352,8 +352,8 @@ function ChallengePrompts({
       {/** ProtectionSessionDuration can't just be an input field */}
       {prompt.validation === ChallengeValidation.ProtectionSessionDuration ? (
         <div key={prompt.id} className="sk-panel-row">
-          <div className="sk-horizontal-group mt-3">
-            <div className="sk-p sk-bold">Allow protected access for</div>
+          <div className="sk-horizontal-group">
+            <div className="sk-p sk-bold">Remember For</div>
             {ProtectionSessionDurations.map((option) => (
               <a
                 className={
@@ -374,13 +374,10 @@ function ChallengePrompts({
         </div>
       ) : (
         <div key={prompt.id} className="sk-panel-row">
-          <form
-            className="w-full"
-            onSubmit={(event) => {
-              event.preventDefault();
-              ctrl.submit();
-            }}
-          >
+          <form className="w-full" onSubmit={(event) => {
+            event.preventDefault();
+            ctrl.submit();
+          }}>
             <input
               className="sk-input contrast"
               value={ctrl.state.values[prompt.id]!.value as string | number}