/* SOCIAL LOGIN BUTTONS HIDE */
.WaGadgetAuthorizationRequired .openAuthFormContainer {
border-right: none;
max-width: 0px;
padding-right: 40px;
display: none;
}

/* PADDING TO SOCIAL LOGIN BUTTONS HIDE */
.WaGadgetAuthorizationRequired .authFormContainer {
padding-left: 0;
}

To remove the login buttons from the member directory personal profiles (at the bottom):

/* MEMBER SOCIAL LOGIN BUTTONS HIDE */
#socialLoginContainer, #idSocialLoginContainer {
display: none;
}
.WaGadgetBlog .boxBodyInfoOuterContainer h5 .postedByLink{
display:none;
}
.WaGadgetBlog .boxBodyInfoOuterContainer h5 .postedByLabel{
display:none;
}
.WaGadgetRecentBlogPosts .gadgetStyleBody ul li .author {
 display: none;
}
.WaGadgetBlog .boxBodyInfoOuterContainer h5 .postedByLink{
display:none;
}
.WaGadgetBlog .boxBodyInfoOuterContainer h5 .postedByLabel{
display:none;
}