Don't override sb_is_evergreen_compatible default value

Issue: 458753458

Change-Id: I1c83475de5727e2976d788fdd83454bbe54e6d47

src/third_party/starboard/rdk/arm/platform_configuration/configuration.gni

diff --git a/src/third_party/starboard/rdk/arm/platform_configuration/configuration.gni b/src/third_party/starboard/rdk/arm/platform_configuration/configuration.gni
index 223c9d3..3ac7bf0 100644
--- a/src/third_party/starboard/rdk/arm/platform_configuration/configuration.gni
+++ b/src/third_party/starboard/rdk/arm/platform_configuration/configuration.gni
@@ -53,5 +53,4 @@
 
 }
 
-sb_is_evergreen_compatible = true
 use_crashpad = true