fix(design): Fix code css definition (#32589)

static/app/styles/global.tsx

@@ -35,16 +35,9 @@ const styles = (theme: Theme, isDark: boolean) => css`
   pre,
   code {
     background-color: ${theme.backgroundSecondary};
-  }
-
-  pre {
     color: ${theme.textColor};
   }
 
-  code {
-    background-color: transparent;
-  }
-
   /**
    * See https://web.dev/prefers-reduced-motion/
    */