css: clean up <ul> css.

* Remove `list-style-type: none` rules (this is the default).
* Add `list-bulleted` and `list-inline` utility classes.
* Wrap terms of service and user deletion pages in dtext `.prose` class
  so we don't have to redefine basic list styles on these pages.

app/javascript/src/styles/specific/error.scss

@@ -1,7 +1,6 @@
 ul.backtrace {
   font-family: monospace;
   font-size: 1.2em;
-  list-style-type: none;
   background: var(--dtext-code-background);
   padding: 1em;
   margin-bottom: 1em;

app/javascript/src/styles/specific/pools.scss

@@ -84,11 +84,3 @@ div#c-pool-versions {
     margin-right: 0.25em;
   }
 }
-
-ul.inline-pool-list {
-  display: inline;
-
-  li {
-    display: inline;
-  }
-}

app/javascript/src/styles/specific/posts.scss

@@ -237,10 +237,6 @@ div#c-posts {
     overflow: hidden;
     border: var(--post-notice-border);
 
-    ul.post-flag-reasons, ul.post-appeal-reasons {
-      list-style: inside;
-    }
-
     p {
       margin-bottom: 0;
     }
@@ -269,10 +265,6 @@ div#c-posts {
     margin-bottom: 1em;
   }
 
-  aside#sidebar > section > ul li {
-    list-style-type: none;
-  }
-
   aside#sidebar > section > ul ul li {
     margin-left: 1em;
   }

app/javascript/src/styles/specific/terms_of_service.scss

@@ -1,24 +0,0 @@
-@import "../base/000_vars.scss";
-
-div#c-static div#a-terms-of-service {
-  h1 {
-    font-size: $h2_size;
-  }
-
-  p {
-    margin-bottom: 1em;
-  }
-
-  ul {
-    margin-left: 1em;
-    margin-bottom: 1em;
-  }
-
-  li {
-    list-style-type: disc;
-  }
-
-  section {
-    margin-bottom: 2em;
-  }
-}

app/javascript/src/styles/specific/user_deletions.scss

@@ -1,10 +0,0 @@
-div#c-maintenance-user-deletions {
-  ul {
-    margin-left: 1em;
-    margin-bottom: 1em;
-  }
-
-  li {
-    list-style-type: disc;
-  }
-}