remove some redundant font-family: monospace

`pre`, `code` tags already set the font-family in these contexts.
Setting it again in the surrounding context is redundant,
and causes inconsistency when embedding notebooks in HTML
(e.g. nbviewer).

IPython/html/static/notebook/less/outputarea.less

@@ -73,7 +73,6 div.output_area {
 }
 
 div.output_area pre {   
-    font-family: @monoFontFamily;
     margin: 0;
     padding: 0;
     border: 0;
@@ -99,7 +98,6 div.output_subarea {
 div.output_text {
     text-align: left;
     color: @textColor;
-    font-family: @monoFontFamily;
     /* This has to match that of the the CodeMirror class line-height below */  
     line-height: @code_line_height;
 }

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

@@ -116,9 +116,9 div.output_area{padding:0;page-break-inside:avoid;display:-webkit-box;-webkit-bo
 div.output_area .rendered_html table{margin-left:0;margin-right:0}
 div.output_area .rendered_html img{margin-left:0;margin-right:0}
 .output{display:-webkit-box;-webkit-box-orient:vertical;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:vertical;-moz-box-align:stretch;display:box;box-orient:vertical;box-align:stretch;width:100%;display:flex;flex-direction:column;align-items:stretch}
-div.output_area pre{font-family:monospace;margin:0;padding:0;border:0;font-size:100%;vertical-align:baseline;color:#000;background-color:transparent;-webkit-border-radius:0;-moz-border-radius:0;border-radius:0;line-height:inherit}
+div.output_area pre{margin:0;padding:0;border:0;font-size:100%;vertical-align:baseline;color:#000;background-color:transparent;-webkit-border-radius:0;-moz-border-radius:0;border-radius:0;line-height:inherit}
 div.output_subarea{padding:.4em .4em 0 .4em;-webkit-box-flex:1;-moz-box-flex:1;box-flex:1;flex:1}
-div.output_text{text-align:left;color:#000;font-family:monospace;line-height:1.21429em}
+div.output_text{text-align:left;color:#000;line-height:1.21429em}
 div.output_stderr{background:#fdd;}
 div.output_latex{text-align:left}
 div.output_javascript:empty{padding:0}

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

@@ -1393,9 +1393,9 div.output_area{padding:0;page-break-inside:avoid;display:-webkit-box;-webkit-bo
 div.output_area .rendered_html table{margin-left:0;margin-right:0}
 div.output_area .rendered_html img{margin-left:0;margin-right:0}
 .output{display:-webkit-box;-webkit-box-orient:vertical;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:vertical;-moz-box-align:stretch;display:box;box-orient:vertical;box-align:stretch;width:100%;display:flex;flex-direction:column;align-items:stretch}
-div.output_area pre{font-family:monospace;margin:0;padding:0;border:0;font-size:100%;vertical-align:baseline;color:#000;background-color:transparent;-webkit-border-radius:0;-moz-border-radius:0;border-radius:0;line-height:inherit}
+div.output_area pre{margin:0;padding:0;border:0;font-size:100%;vertical-align:baseline;color:#000;background-color:transparent;-webkit-border-radius:0;-moz-border-radius:0;border-radius:0;line-height:inherit}
 div.output_subarea{padding:.4em .4em 0 .4em;-webkit-box-flex:1;-moz-box-flex:1;box-flex:1;flex:1}
-div.output_text{text-align:left;color:#000;font-family:monospace;line-height:1.21429em}
+div.output_text{text-align:left;color:#000;line-height:1.21429em}
 div.output_stderr{background:#fdd;}
 div.output_latex{text-align:left}
 div.output_javascript:empty{padding:0}