Revert "depot_tools: Include vpython in cipd bundle."

This reverts commit 1222ecd5.

Reason for revert:
recipes should never run any of the shims which fetch cipd packages in depot_tools

Original change's description:
> depot_tools: Include vpython in cipd bundle.
> 
> Tbr: iannucci@chromium.org
> Bug: 984182
> Change-Id: I01b0e12179d2314c48c00d74550ceea1e32b355d
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1749844
> Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
> Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>

TBR=iannucci@chromium.org,ehmaldonado@chromium.org

Change-Id: Iadf11b480c03e0bd57ba2c4210d39bdc6cb27b3d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 984182
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1749851Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>

.gitattributes

@@ -10,7 +10,7 @@
 /*.sh  recipes
 
 # vpython and vpython specs
-/vpython*       recipes
+/vpython*
 /gsutil.vpython recipes
 /.vpython       recipes