Revert "Fixed SDK lookup for non C:\ Windows installation."

This reverts commit 57fd44c7.

Reason for revert: suspect for messing up symbols on Win7 bot
                   @ crbug.com/846313

Original change's description:
> Fixed SDK lookup for non C:\ Windows installation.
>
> Bug: None
> Change-Id: Ia0aa186d1d39b1beac8ce0152683f774ad5d2eaf
> Reviewed-on: https://chromium-review.googlesource.com/1066065
> Reviewed-by: Jochen Eisinger <jochen@chromium.org>
> Commit-Queue: Jochen Eisinger <jochen@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#561063}

TBR=jochen@chromium.org,yura.yaroshevich@gmail.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 846313
Change-Id: Id93a965aea5555961c539d47e05e79410894eff8
Reviewed-on: https://chromium-review.googlesource.com/1072307
Commit-Queue: Gabriel Charette <gab@chromium.org>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#561609}

AUTHORS

@@ -922,7 +922,6 @@ Yumikiyo Osanai <yumios.art@gmail.com>
 Yunchao He <yunchao.he@intel.com>
 Yunsik Jang <yunsik.jang@lge.com>
 Yupei Wang <perryuwang@tencent.com>
-Yura Yaroshevich <yura.yaroshevich@gmail.com>
 Yuri Gorobets <yuri.gorobets@gmail.com>
 Yuriy Taraday <yorik.sar@gmail.com>
 Zeno Albisser <zeno.albisser@digia.com>

build/vs_toolchain.py

@@ -205,8 +205,7 @@ def _CopyUCRTRuntime(target_dir, source_dir, target_cpu, dll_pattern, suffix):
   # DEPOT_TOOLS_WIN_TOOLCHAIN=0 and vcvarsall.bat has not been run.
   win_sdk_dir = os.path.normpath(
       os.environ.get('WINDOWSSDKDIR',
-                     os.path.expandvars('%ProgramFiles(x86)%'
-                                        '\\Windows Kits\\10')))
+                     'C:\\Program Files (x86)\\Windows Kits\\10'))
   ucrt_dll_dirs = os.path.join(win_sdk_dir, 'Redist', 'ucrt', 'DLLs',
                                target_cpu)
   ucrt_files = glob.glob(os.path.join(ucrt_dll_dirs, 'api-ms-win-*.dll'))

build/win/copy_cdb_to_output.py

@@ -62,8 +62,7 @@ def _CopyCDBToOutput(output_dir, target_arch):
   # when DEPOT_TOOLS_WIN_TOOLCHAIN=0 and vcvarsall.bat has not been run.
   win_sdk_dir = os.path.normpath(
       os.environ.get('WINDOWSSDKDIR',
-                     os.path.expandvars('%ProgramFiles(x86)%'
-                                        '\\Windows Kits\\10')))
+                     'C:\\Program Files (x86)\\Windows Kits\\10'))
   if target_arch == 'ia32' or target_arch == 'x86':
     src_arch = 'x86'
   elif target_arch == 'x64':