[Impeller] Remove un-actionable info log about validations. (#43575)

impeller/renderer/backend/vulkan/capabilities_vk.cc

diff --git a/impeller/renderer/backend/vulkan/capabilities_vk.cc b/impeller/renderer/backend/vulkan/capabilities_vk.cc
index a09c13b..33e3ca7 100644
--- a/impeller/renderer/backend/vulkan/capabilities_vk.cc
+++ b/impeller/renderer/backend/vulkan/capabilities_vk.cc
@@ -141,8 +141,6 @@
     if (HasExtension("VK_EXT_validation_features")) {
       // It's valid to not have `VK_EXT_validation_features` available.  That's
       // the case when using AGI as a frame debugger.
-      FML_DLOG(INFO) << "Requested validations but could not find the "
-                        "VK_EXT_validation_features extension.";
       required.push_back("VK_EXT_validation_features");
     }
   }