Revert of Use visual studio toolchain from depot_tools for PDFium compilation (patchset #3 id:40001 of https://codereview.chromium.org/1897523002/ )

Reason for revert:
Clang build is broken. drm build has some problem. Will revert this change for now.

Original issue's description:
> Use visual studio toolchain from depot_tools for PDFium compilation
>
> Change to use visual studio toolchain from depot_tools by default.
> Setting DEPOT_TOOLS_WIN_TOOLCHAIN=0 allows compilation using system
> toolchain as before.
>
> Using toolchain from depot_tools unifies the compilation
> environment, and brings the benefits of automated update, bug fixes
> etc.
>
> Committed: https://pdfium.googlesource.com/pdfium/+/590f2d9e057a0d5b17a9706affd3c6115265021b

TBR=brucedawson@chromium.org,thestig@chromium.org,tsepez@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/1922373003

1 files changed, 0 insertions, 6 deletions

diff --git a/DEPS b/DEPS
index 1a08ef31eb..7fb3a32b6e 100644
--- a/DEPS
+++ b/DEPS
@@ -169,10 +169,4 @@ hooks = [
                '--if-needed'
     ],
   },
-  {
-    # Update the Windows toolchain if necessary.
-    'name': 'win_toolchain',
-    'pattern': '.',
-    'action': ['python', 'pdfium/build_gyp/vs_toolchain.py', 'update'],
-  },
 ]