RuleContext does not actually need to check if a fragment is PlatformConfiguration.

PiperOrigin-RevId: 305667335

src/main/java/com/google/devtools/build/lib/analysis/RuleContext.java

diff --git a/src/main/java/com/google/devtools/build/lib/analysis/RuleContext.java b/src/main/java/com/google/devtools/build/lib/analysis/RuleContext.java
index b3fb171..34fa85b 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/RuleContext.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/RuleContext.java
@@ -512,7 +512,6 @@
   public <T extends Fragment> boolean isLegalFragment(
       Class<T> fragment, ConfigurationTransition transition) {
     return universalFragments.contains(fragment)
-        || fragment == PlatformConfiguration.class
         || configurationFragmentPolicy.isLegalConfigurationFragment(fragment, transition);
   }