remove unused security warning

IPython/html/static/notebook/js/textcell.js

@@ -242,17 +242,6 b' var IPython = (function (IPython) {'
         this.element.find('div.text_cell_render').html(text);
     };
 
-    TextCell.prototype.insert_security_warning = function() {
-        // Inject a security warning into the TextCell's rendered div.
-        var e = this.element.find('div.text_cell_render');
-        e.empty();
-        var warning = "This cell contains content that is unsafe from a security " +
-                      "standpoint. This unsafe content includes all JavaScript code " +
-                      "and CSS styling. To fix the problem, please edit the cell " +
-                      "and remove the unsafe content."
-        e.append($('<div/>').addClass('alert alert-error').text(warning));
-    }
-
     /**
      * @method at_top
      * @return {Boolean}

IPython/html/static/notebook/less/textcell.less

@@ -11,10 +11,6 b' div.text_cell_render {'
     border-style: none;
     padding: 0.5em 0.5em 0.5em @code_padding;
     color: @textColor;
-    
-    .alert.alert-error {
-        margin: 0px;
-    }
 }
 
 a.anchor-link:link {

IPython/html/static/style/ipython.min.css

@@ -166,7 +166,7 b' p.p-space{margin-bottom:10px}'
 .rendered_html img{display:block;margin-left:auto;margin-right:auto}
 .rendered_html *+img{margin-top:1em}
 div.text_cell{padding:5px 5px 5px 0;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;display:flex;flex-direction:row;align-items:stretch}
-div.text_cell_render{outline:none;resize:none;width:inherit;border-style:none;padding:.5em .5em .5em .4em;color:#000}div.text_cell_render .alert.alert-error{margin:0}
+div.text_cell_render{outline:none;resize:none;width:inherit;border-style:none;padding:.5em .5em .5em .4em;color:#000}
 a.anchor-link:link{text-decoration:none;padding:0 20px;visibility:hidden}
 h1:hover .anchor-link,h2:hover .anchor-link,h3:hover .anchor-link,h4:hover .anchor-link,h5:hover .anchor-link,h6:hover .anchor-link{visibility:visible}
 div.cell.text_cell.rendered{padding:0}

IPython/html/static/style/style.min.css

@@ -1443,7 +1443,7 b' p.p-space{margin-bottom:10px}'
 .rendered_html img{display:block;margin-left:auto;margin-right:auto}
 .rendered_html *+img{margin-top:1em}
 div.text_cell{padding:5px 5px 5px 0;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;display:flex;flex-direction:row;align-items:stretch}
-div.text_cell_render{outline:none;resize:none;width:inherit;border-style:none;padding:.5em .5em .5em .4em;color:#000}div.text_cell_render .alert.alert-error{margin:0}
+div.text_cell_render{outline:none;resize:none;width:inherit;border-style:none;padding:.5em .5em .5em .4em;color:#000}
 a.anchor-link:link{text-decoration:none;padding:0 20px;visibility:hidden}
 h1:hover .anchor-link,h2:hover .anchor-link,h3:hover .anchor-link,h4:hover .anchor-link,h5:hover .anchor-link,h6:hover .anchor-link{visibility:visible}
 div.cell.text_cell.rendered{padding:0}