chrome_set_ver: punt old script

We deleted this in chromite back in 2013.  Looks like we forgot to
clean up depot_tools.

Bug: 216050
Change-Id: I7e7591aaa319ab1aeb7cc3f34e33b313b5029257
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2812199
Reviewed-by: Stephane Belmon <sbelmon@google.com>
Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Commit-Queue: Josip Sokcevic <sokcevic@google.com>

.gitattributes

@@ -31,7 +31,6 @@
 
 # Symlinks
 /cbuildbot      recipes
-/chrome_set_ver recipes
 /cros*          recipes
 
 /support/* recipes

OWNERS

@@ -19,7 +19,6 @@ per-file ninjalog*=tikuta@chromium.org
 per-file pylint*=vapier@chromium.org
 
 per-file cbuildbot=file://CROS_OWNERS
-per-file chrome_set_ver=file://CROS_OWNERS
 per-file cros=file://CROS_OWNERS
 per-file cros_sdk=file://CROS_OWNERS
 per-file repo=file://CROS_OWNERS

chrome_set_ver

@@ -1 +0,0 @@
-cros