Well, you can use these codes in the “Custom CSS ” textarea under Morphis Theme Options > General Settings>

/* code below deletes the dashed line from the Full-width template */
#comments hr {
     display: none;

/* codes below deletes the footer only when on Full-width or default page template */
.page-template-template-full-width-php #footer-wrapper,
.page-template-default #footer-wrapper {
display: none;

/* code below deletes the 'black line' from footer */
#siteInfo {
border-top: none;
-webkit-box-shadow: none;
-moz-box-shadow: none;
box-shadow: none;