Edit or remove Recent Post, Categories, Meta and Pages
The “Recent Post” along with other 3 columns are part of ”Footer Widgets” and are loaded by default when there are no widgets. To change it you can add your own widgets in Appearance > Widgets > Footer Widgets.
You can also disable the footer widgets section in Sinbad > Footer > Footer Top Widgets >
Show Footer Top Widgets to “No”.
Footer Bottom Widgets
How to delete “Recent Post” , “Categories” , “Meta and “Pages” Titles
The area you’ve marked is the ”Footer Bottom Widgets”. They are the default widgets. You can add your own widgets to Appearance > Widgets > Footer Bottom Widgets.