Remove ConfigurationTransitionProxy.NONE and BaseRuleClasses.DYNAMIC_TRANSITION_MAP.

This leaves DATA as the last remaining legacy transition.

PiperOrigin-RevId: 182422552
diff --git a/src/test/java/com/google/devtools/build/lib/skylark/SkylarkRuleClassFunctionsTest.java b/src/test/java/com/google/devtools/build/lib/skylark/SkylarkRuleClassFunctionsTest.java
index bcd42e8..58dfecf 100644
--- a/src/test/java/com/google/devtools/build/lib/skylark/SkylarkRuleClassFunctionsTest.java
+++ b/src/test/java/com/google/devtools/build/lib/skylark/SkylarkRuleClassFunctionsTest.java
@@ -23,6 +23,7 @@
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Iterables;
 import com.google.devtools.build.lib.analysis.config.transitions.ConfigurationTransitionProxy;
+import com.google.devtools.build.lib.analysis.config.transitions.NoTransition;
 import com.google.devtools.build.lib.analysis.skylark.SkylarkAttr;
 import com.google.devtools.build.lib.analysis.skylark.SkylarkAttr.Descriptor;
 import com.google.devtools.build.lib.analysis.skylark.SkylarkFileType;
@@ -545,7 +546,7 @@
   @Test
   public void testAttrCfgTarget() throws Exception {
     Attribute attr = buildAttribute("a1", "attr.label(cfg = 'target', allow_files = True)");
-    assertThat(attr.getConfigurationTransition()).isEqualTo(ConfigurationTransitionProxy.NONE);
+    assertThat(attr.getConfigurationTransition()).isEqualTo(NoTransition.INSTANCE);
   }
 
   @Test