Remove extra mains

src/pages/admin/AdminCreateCommon.tsx

@@ -7,7 +7,7 @@ import { Post } from "@models/Feed";
 import { SignupForm } from "@models/SignupForm";
 import { JobAd } from "@models/JobAd";
 
-const Common = styled.main`
+const Common = styled.div`
   width: 100%;
 
   .rjsf {

src/pages/admin/AdminListCommon.tsx

@@ -1,7 +1,7 @@
 import styled from "styled-components";
 import { colors } from "@theme/colors";
 
-const Main = styled.main`
+const Main = styled.div`
   table {
     border-collapse: collapse;
   }

src/pages/admin/AdminLoginPage.tsx

@@ -5,7 +5,7 @@ import { Redirect } from "react-router-dom";
 import qs from "query-string";
 import { generateToken, setTokenCookie, isAuthenticated } from "@utils/auth";
 
-const Main = styled.main`
+const Main = styled.div`
   input {
     display: block;
   }