Remove unused maxCount property from GrAccountList

Release-Notes: skip
Change-Id: Ia3fda4afb94706a57246e533bc7d5938dcfdc230
diff --git a/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts b/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts
index 48d6998..9ed6f6c 100644
--- a/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts
+++ b/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts
@@ -167,9 +167,6 @@
   @property({type: Array})
   removableValues?: AccountInput[];
 
-  @property({type: Number})
-  maxCount = 0;
-
   /**
    * Returns suggestion items
    */
@@ -234,8 +231,7 @@
       </div>
       <gr-account-entry
         borderless=""
-        ?hidden=${(this.maxCount && this.maxCount <= this.accounts.length) ||
-        this.readonly}
+        ?hidden=${this.readonly}
         id="entry"
         .placeholder=${this.placeholder}
         @add=${this.handleAdd}
diff --git a/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list_test.ts b/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list_test.ts
index 7b3a93d..26566a3 100644
--- a/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list_test.ts
+++ b/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list_test.ts
@@ -400,16 +400,6 @@
     assert.equal(element.accounts.length, 1);
   });
 
-  test('max-count', async () => {
-    element.maxCount = 1;
-    const acct = makeAccount();
-    handleAdd({account: acct, count: 1});
-    await element.updateComplete;
-    assert.isTrue(
-      queryAndAssert<GrAccountEntry>(element, '#entry').hasAttribute('hidden')
-    );
-  });
-
   test('enter text calls suggestions provider', async () => {
     const suggestions: Suggestion[] = [
       {