istwcms-4223: more column widths

I'm concerned with this one as to why those lines deleted - I didn't intentionally remove anything. However, after doing a clean rebuild of the profile using option 2, git status already shows that these changes have been made, before even checking out my branch.

Other than confirming whether or not the deleted lines are acceptable and potentially fixing whatever causes them to be removed, the testing is that the styling works as desired, as outlined in the other merge request for this ticket.

css/styles.css

@@ -1893,37 +1893,17 @@ svg:not(:root) {
     @media (min-width: 80rem) {
       .layout.uw-contained-width {
         padding: 1rem 0; } }
+    .layout.uw-contained-width--narrow {
+      /* Match the width of WCMS2's narrow: 496px */
+      max-width: 31rem; }
+    .layout.uw-contained-width--wide {
+      /* Match the width of WCMS2's wide: 753px */
+      max-width: 47.0625rem; }
   .layout.uw-full-width {
     max-width: 100%;
     padding: 0;
     width: 100%; }
 
-.layout.uw-contained-width {
-  margin-left: auto;
-  margin-right: auto;
-  max-width: 63.1875rem;
-  padding: 0 16px; }
-  @media (min-width: 80rem) {
-    .layout.uw-contained-width {
-      padding-left: 0;
-      padding-right: 0; } }
-
-.layout--uwtwocol {
-  display: grid; }
-  .layout--uwtwocol .layout__region--first {
-    grid-column: 1 / 2; }
-  .layout--uwtwocol .layout__region--second {
-    grid-column: 2 / 3; }
-
-.layout--uwtwocol.larger-left {
-  grid-template-columns: 67% 33%; }
-
-.layout--uwtwocol.larger-right {
-  grid-template-columns: 33% 67%; }
-
-.layout--uwtwocol.even-split {
-  grid-template-columns: 50% 50%; }
-
 .l-media {
   display: flex;
   flex-direction: column; }