Remove unneeded base/strings/stringprintf.h includes.

List of files to delete from generated using the following command:

git grep -l base/strings/stringprintf.h | \
    xargs grep -L 'StringPrint[fV]' | xargs grep -L StringAppend | \
    grep -E '(cc|mm|h)$'

Change-Id: Ibc72245f08730b4d25283e2d966235b61513c7ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2849392
Reviewed-by: Peter Boström <pbos@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Owners-Override: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#876365}

components/safe_search_api/url_checker.cc

@@ -17,7 +17,6 @@
 #include "base/stl_util.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
-#include "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "components/google/core/common/google_util.h"