Remove Keybase integration (#17045)

app/javascript/styles/mastodon/forms.scss

@@ -999,68 +999,6 @@ code {
   }
 }
 
-.connection-prompt {
-  margin-bottom: 25px;
-
-  .fa-link {
-    background-color: darken($ui-base-color, 4%);
-    border-radius: 100%;
-    font-size: 24px;
-    padding: 10px;
-  }
-
-  &__column {
-    align-items: center;
-    display: flex;
-    flex: 1;
-    flex-direction: column;
-    flex-shrink: 1;
-    max-width: 50%;
-
-    &-sep {
-      align-self: center;
-      flex-grow: 0;
-      overflow: visible;
-      position: relative;
-      z-index: 1;
-    }
-
-    p {
-      word-break: break-word;
-    }
-  }
-
-  .account__avatar {
-    margin-bottom: 20px;
-  }
-
-  &__connection {
-    background-color: lighten($ui-base-color, 8%);
-    box-shadow: 0 0 15px rgba($base-shadow-color, 0.2);
-    border-radius: 4px;
-    padding: 25px 10px;
-    position: relative;
-    text-align: center;
-
-    &::after {
-      background-color: darken($ui-base-color, 4%);
-      content: '';
-      display: block;
-      height: 100%;
-      left: 50%;
-      position: absolute;
-      top: 0;
-      width: 1px;
-    }
-  }
-
-  &__row {
-    align-items: flex-start;
-    display: flex;
-    flex-direction: row;
-  }
-}
-
 .input.user_confirm_password,
 .input.user_website {
   &:not(.field_with_errors) {