[SDK-1284] Fix for "growing" tabs when repeatedly clicked (#1904)

* Remove display: initial, remove animation from form element

* Add blank line

* Remove fade from original rule rather than in an override

Author: Steve Hobbs

css/index.styl

@@ -321,8 +321,6 @@ loadingSize = 30px
     box-sizing border-box
 
   .auth0-lock-form
-    -webkit-animation fadeIn .2s
-    animation fadeIn .2s
     padding 20px
 
     h2
@@ -1405,10 +1403,3 @@ input[type="button"]
 _:-ms-fullscreen, :root .auth0-lock.auth0-lock .auth0-lock-content-wrapper
   flex-basis: auto !important
   max-height: 70vh
-
-// iPhone display fix - https://github.com/auth0/lock/issues/1588
-.auth0-lock-iphone.auth0-lock .auth0-lock-form
-  display: initial;
-
-.auth0-lock-iphone.auth0-lock .auth0-lock-content
-  padding: 20px;