Revert of When not writing to file in DM, spew verbose output to stderr (patchset #1 id:1 of https://codereview.chromium.org/1788743002/ )

Reason for revert:
Looks like not all the bots are using --writePath (think, Valgrind, *SAN) so this causes those bots to spew like crazy.

Looks like we need to find a more explicit way to make this mode work.

Original issue's description:
> When not writing to file in DM, spew verbose output to stderr
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1788743002
>
> Committed: https://skia.googlesource.com/skia/+/40dec542cc12b354762bca2c0d68bc419f0cbebd

TBR=egdaniel@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1783603006
diff --git a/dm/DM.cpp b/dm/DM.cpp
index ebe37ae..d558e08 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -1303,13 +1303,9 @@
 int dm_main() {
     setup_crash_handler();
 
-    if (FLAGS_verbose) {
-        if(!FLAGS_writePath.isEmpty()) {
-            sk_mkdir(FLAGS_writePath[0]);
-            gVLog = freopen(SkOSPath::Join(FLAGS_writePath[0], "verbose.log").c_str(), "w", stderr);
-        } else {
-            gVLog = stderr;
-        }
+    if (FLAGS_verbose && !FLAGS_writePath.isEmpty()) {
+        sk_mkdir(FLAGS_writePath[0]);
+        gVLog = freopen(SkOSPath::Join(FLAGS_writePath[0], "verbose.log").c_str(), "w", stderr);
     }
 
     JsonWriter::DumpJson();  // It's handy for the bots to assume this is ~never missing.