Use os:Windows dimensions for all Windows GPU FYI bots.

These bots are not doing the testing themselves so they don't need to be
on a specific version of Windows.

BUG=811828
BUG=811794
BUG=811791
BUG=811823
BUG=811871
BUG=811830
BUG=812108
BUG=811867
BUG=811817
BUG=811800
BUG=811826
BUG=811833
BUG=811805
BUG=811824
BUG=811793
BUG=811868
BUG=811783
BUG=811818
BUG=811788
BUG=811784
TBR=nodir@chromium.org
NOTRY=true

Change-Id: I76d933833e7944d36052e6dca64e7c3df2425190
Reviewed-on: https://chromium-review.googlesource.com/964603
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543417}

infra/config/global/cr-buildbucket.cfg

@@ -714,67 +714,54 @@ buckets {
     builders {
       name: "Win10 FYI Debug (NVIDIA)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-10"
     }
     builders {
       name: "Win10 FYI dEQP Release (NVIDIA)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-10"
     }
     builders {
       name: "Win10 FYI Exp Release (NVIDIA)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-10"
     }
     builders {
       name: "Win10 FYI Release (Intel HD 630)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-10"
     }
     builders {
       name: "Win10 FYI Release (NVIDIA)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-10"
     }
     builders {
       name: "Win7 FYI Debug (AMD)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-7"
     }
     builders {
       name: "Win7 FYI Debug (NVIDIA)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-7"
     }
     builders {
       name: "Win7 FYI dEQP Release (AMD)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-7"
     }
     builders {
       name: "Win7 FYI Release (AMD)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-7"
     }
     builders {
       name: "Win7 FYI Release (NVIDIA)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-7"
     }
     builders {
       name: "Win7 FYI x64 Debug (NVIDIA)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-7"
     }
     builders {
       name: "Win7 FYI x64 dEQP Release (NVIDIA)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-7"
     }
     builders {
       name: "Win7 FYI x64 Release (NVIDIA)"
       mixins: "win-gpu-fyi-ci"
-      dimensions: "os:Windows-7"
     }
   }
 }