Stop generating two .rc files that are unused after r243503.

chrome/app/theme/chrome_unscaled_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This grd file contains images that are not pre-scaled for device
      scale factors. The image returned by
      |base::ResourceBundle::GetImageNamed| only contains 100P, and
      it is the caller's responsibility to do the right thing when the
      display is not at 100P device scale factor.
   -->
 <grit latest_public_release="0" current_release="1">
   <outputs>
     <output filename="grit/chrome_unscaled_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="chrome_unscaled_resources.pak" type="data_package" />
-    <output filename="chrome_unscaled_resources.rc" type="rc_all" />
   </outputs>
   <release seq="1">
     <includes>
       <if expr="pp_ifdef('_google_chrome')">
         <include name="IDR_PRODUCT_LOGO_64" file="google_chrome/product_logo_64.png" type="BINDATA" />
         <include name="IDR_PRODUCT_LOGO_128" file="google_chrome/product_logo_128.png" type="BINDATA" />
         <!-- NOTE: product_logo_*.* files beyond what's listed above are
              referenced by installer code; don't remove them unless you know
              what you're doing! -->
         <if expr="is_macosx">
@@ skipping 70 matching lines @@
         <if expr="not pp_ifdef('_google_chrome')">
           <include name="IDR_APP_LIST_16" file="chromium/app_list_16.png" type="BINDATA" />
           <include name="IDR_APP_LIST_32" file="chromium/app_list_32.png" type="BINDATA" />
           <include name="IDR_APP_LIST_128" file="chromium/app_list_128.png" type="BINDATA" />
           <include name="IDR_APP_LIST_256" file="chromium/app_list_256.png" type="BINDATA" />
         </if>
       </if>
     </includes>
   </release>
 </grit>