Revert of Turn on NVPR 4x MSAA by default when supported in DM and nanobench. (patchset #2 id:20001 of https://codereview.chromium.org/704563003/)

Reason for revert:
Timing out on nvpr when drawing conics. Fix will take some thought so reverting for now.

Original issue's description:
> Turn on NVPR 4x MSAA by default when supported in DM and nanobench.
>
> This brings DM and nanobench's default configs in line with GM's.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/31f88675718966bbb7f09718b40de10c7e214739

TBR=bsalomon@google.com,mtklein@google.com,mtklein@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/693933004
diff --git a/tools/flags/SkCommonFlags.cpp b/tools/flags/SkCommonFlags.cpp
index 4d329c5..99d05c1 100644
--- a/tools/flags/SkCommonFlags.cpp
+++ b/tools/flags/SkCommonFlags.cpp
@@ -7,7 +7,7 @@
 
 #include "SkCommonFlags.h"
 
-DEFINE_string(config, "565 8888 pdf gpu nonrendering angle nvprmsaa4",
+DEFINE_string(config, "565 8888 pdf gpu nonrendering angle",
               "Options: 565 8888 pdf gpu nonrendering msaa4 msaa16 nvprmsaa4 nvprmsaa16 "
               "gpunull gpudebug angle mesa");