CodeHealth: Remove chrome/browser/devtools from NOT_CONVERTED* list.

Removes '^chrome/browser/devtools/' from the
_NOT_CONVERTED_TO_MODERN_BIND_AND_CALLBACK list in src/PRESUBMIT.py,
as the chrome/browser/devtools directory has now been fully converted.

Bug: 1007635
Change-Id: I370bcca30d2869b46c6e407ea336fa78824f1b30
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2645155Reviewed-by: Charlie Reis <creis@chromium.org>
Commit-Queue: Cammie Smith Barnes <cammie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#846366}

PRESUBMIT.py

@@ -337,7 +337,6 @@ _NOT_CONVERTED_TO_MODERN_BIND_AND_CALLBACK = '|'.join((
   '^chrome/browser/chromeos/',
   '^chrome/browser/component_updater/',
   '^chrome/browser/device_identity/chromeos/device_oauth2_token_store_chromeos.cc', # pylint: disable=line-too-long
-  '^chrome/browser/devtools/',
   '^chrome/browser/download/',
   '^chrome/browser/extensions/',
   '^chrome/browser/history/',