Delete the code that passes the driver version to the GPU process.

TBR=kbr@chromium.org

Bug: angleproject:4641
Change-Id: I92e20c3a3c64f8481fc1f0671827ac689da23edb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2208179
Commit-Queue: Maggie Chen <magchen@chromium.org>
Reviewed-by: Maggie Chen <magchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#769917}

content/browser/gpu/gpu_process_host.cc

@@ -1138,13 +1138,6 @@ bool GpuProcessHost::LaunchGpuProcess() {
     cmd_line->AppendSwitchASCII(switches::kGpuRevision,
                                 base::StringPrintf("%u", device_info.revision));
 #endif
-    if (device_info.driver_version.length()) {
-      std::string version_str = device_info.driver_version;
-      base::debug::Alias(&version_str);
-
-      cmd_line->AppendSwitchASCII(switches::kGpuDriverVersion,
-                                  device_info.driver_version);
-    }
   }
 
   // TODO(penghuang): Replace all GPU related switches with GpuPreferences.