Remove refs to Grit's output_all_resource_defines option.

This option is no longer respected by Grit, as of crrev.com/c/786121 (~7
years ago), but it is still present in a lot of grd files.

Bug: 389466679
Change-Id: I4f9b5873fbfdd6e3548f875c27c1de825837a595
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6187824
Reviewed-by: Alex Rudenko <[email protected]>
Auto-Submit: Demetrios Papadopoulos <[email protected]>
Commit-Queue: Alex Rudenko <[email protected]>
Reviewed-by: Simon Zünd <[email protected]>

Author: freshp86

inspector_overlay/resources.grd

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<grit latest_public_release="0" current_release="1" output_all_resource_defines="false">
+<grit latest_public_release="0" current_release="1">
   <outputs>
     <output filename="grit/inspector_overlay_resources_map.h" type="rc_header">
       <emit emit_type="prepend"></emit>

scripts/build/generate_devtools_grd.py

@@ -37,8 +37,7 @@
 
 kDevToolsResourcePrefix = 'IDR_DEVTOOLS_'
 kGrdTemplate = '''<?xml version="1.0" encoding="UTF-8"?>
-<grit latest_public_release="0" current_release="1"
-      output_all_resource_defines="false">
+<grit latest_public_release="0" current_release="1">
   <outputs>
     <output filename="grit/devtools_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>