Remove dpranke@ as a general-purpose OWNER.

This removes me (dpranke@google.com) as a general purpose OWNER
and leaves me with just the build-specific files (stuff related to
GN and Ninja, basically).

Now that we have a dedicated team supporting depot_tools my OWNERship
is less necessary. I'm happy to continue reviewing things wherever
that might be helpful.

Change-Id: I0585b1f7c958c871e6e1a68fd37d8cd5a645494d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4412691
Reviewed-by: Joanna Wang <jojwang@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@google.com>

OWNERS

@@ -2,17 +2,20 @@ set noparent
 
 ajp@google.com
 aravindvasudev@google.com
-dpranke@google.com
 gavinmak@google.com
 jojwang@google.com
 sokcevic@google.com
 
-per-file ninja*=thakis@chromium.org
-
 per-file autoninja*=brucedawson@chromium.org
-per-file post_build_ninja_summary.py=brucedawson@chromium.org
+per-file autoninja*=dpranke@google.com
+
+per-file gn*=dpranke@google.com
+
+per-file ninja*=dpranke@google.com
+per-file ninja*=thakis@chromium.org
 per-file ninja_reclient.py=file://GOMA_OWNERS
 per-file ninjalog*=tikuta@chromium.org
+per-file post_build_ninja_summary.py=brucedawson@chromium.org
 
 per-file presubmit*.py=brucedawson@chromium.org