fix(editor): remove remaining gutter icon hover backgrounds

src/editor/navigation/LineMarkers.module.css

@@ -14,6 +14,3 @@
   border-radius: var(--radius-small);
   cursor: pointer;
 }
-.marker:hover {
-  background: var(--bg-hover);
-}

src/features/graphql/GraphQL.module.css

@@ -220,9 +220,6 @@
   border-radius: var(--radius-small);
   cursor: pointer;
 }
-.runMarker:hover {
-  background: var(--bg-hover);
-}
 
 /* Query result and variables: JSON in the editor's syntax colours. */
 .output :global(.tok-propertyName),

src/features/services/Services.module.css

@@ -160,9 +160,6 @@
   border-radius: var(--radius-small);
   cursor: pointer;
 }
-.marker:hover {
-  background: var(--bg-hover);
-}
 
 .fieldRow {
   display: flex;