cmake: Don't copy legacy, unused Chromium file

While CEF continues to ship & read this up to and including in CEF 6834,
it hasn't actually been used since Chromium 66, so we can safely remove
it without causing regressions in 5060 or 6533.

https://bitbucket.org/chromiumembedded/cef/commits/719f423e7030540f9b334d12e2ef9f82fc759a36

cmake/linux/helpers.cmake

@@ -174,9 +174,8 @@ function(set_target_properties_obs target)
             COMMAND
               "${CMAKE_COMMAND}" -E copy_if_different "${imported_location}" "${cef_location}/chrome-sandbox"
               "${cef_location}/libEGL.so" "${cef_location}/libGLESv2.so" "${cef_location}/libvk_swiftshader.so"
-              "${cef_location}/libvulkan.so.1" "${cef_location}/snapshot_blob.bin"
-              "${cef_location}/v8_context_snapshot.bin" "${cef_location}/vk_swiftshader_icd.json"
-              "${OBS_OUTPUT_DIR}/$<CONFIG>/${OBS_PLUGIN_DESTINATION}/"
+              "${cef_location}/libvulkan.so.1" "${cef_location}/v8_context_snapshot.bin"
+              "${cef_location}/vk_swiftshader_icd.json" "${OBS_OUTPUT_DIR}/$<CONFIG>/${OBS_PLUGIN_DESTINATION}/"
             COMMAND
               "${CMAKE_COMMAND}" -E copy_if_different "${cef_root_location}/Resources/chrome_100_percent.pak"
               "${cef_root_location}/Resources/chrome_200_percent.pak" "${cef_root_location}/Resources/icudtl.dat"
@@ -195,7 +194,6 @@ function(set_target_properties_obs target)
               "${cef_location}/libGLESv2.so"
               "${cef_location}/libvk_swiftshader.so"
               "${cef_location}/libvulkan.so.1"
-              "${cef_location}/snapshot_blob.bin"
               "${cef_location}/v8_context_snapshot.bin"
               "${cef_location}/vk_swiftshader_icd.json"
               "${cef_root_location}/Resources/chrome_100_percent.pak"

cmake/windows/helpers.cmake

@@ -109,8 +109,8 @@ function(set_target_properties_obs target)
             COMMAND "${CMAKE_COMMAND}" -E make_directory "${OBS_OUTPUT_DIR}/$<CONFIG>/${target_destination}"
             COMMAND
               "${CMAKE_COMMAND}" -E copy_if_different "${imported_location}" "${cef_location}/chrome_elf.dll"
-              "${cef_location}/libEGL.dll" "${cef_location}/libGLESv2.dll" "${cef_location}/snapshot_blob.bin"
-              "${cef_location}/v8_context_snapshot.bin" "${OBS_OUTPUT_DIR}/$<CONFIG>/${target_destination}"
+              "${cef_location}/libEGL.dll" "${cef_location}/libGLESv2.dll" "${cef_location}/v8_context_snapshot.bin"
+              "${OBS_OUTPUT_DIR}/$<CONFIG>/${target_destination}"
             COMMAND
               "${CMAKE_COMMAND}" -E copy_if_different "${cef_root_location}/Resources/chrome_100_percent.pak"
               "${cef_root_location}/Resources/chrome_200_percent.pak" "${cef_root_location}/Resources/icudtl.dat"
@@ -127,7 +127,6 @@ function(set_target_properties_obs target)
               "${cef_location}/chrome_elf.dll"
               "${cef_location}/libEGL.dll"
               "${cef_location}/libGLESv2.dll"
-              "${cef_location}/snapshot_blob.bin"
               "${cef_location}/v8_context_snapshot.bin"
               "${cef_root_location}/Resources/chrome_100_percent.pak"
               "${cef_root_location}/Resources/chrome_200_percent.pak"