Delete the node property TRANSPILED and stop serializing/deserializing it with TypedAST

PiperOrigin-RevId: 550607458

Author: rishipal

src/com/google/javascript/rhino/Node.java

@@ -173,9 +173,6 @@ enum Prop {
     FEATURE_SET,
     // Indicates a TypeScript abstract method or class, for use in Migrants
     IS_TYPESCRIPT_ABSTRACT,
-    // TODO: b/279241038 Delete this prop as it's no longer used.
-    // Indicates that a SCRIPT represents a transpiled file
-    TRANSPILED,
     // For passes that work only on deleted funs.
     DELETED,
     // Indicates that the node is an alias or a name from goog.require'd module or ES6

src/com/google/javascript/rhino/PropTranslator.java

@@ -143,9 +143,6 @@ private static final void setProps() {
         return NodeProperty.COMPUTED_PROP_VARIABLE;
       case GOOG_MODULE:
         return NodeProperty.GOOG_MODULE;
-      case TRANSPILED:
-        // TODO: b/279241038 Delete this prop as it's no longer used.
-        return NodeProperty.TRANSPILED;
       case MODULE_ALIAS:
         return NodeProperty.MODULE_ALIAS;
       case MODULE_EXPORT:

src/com/google/javascript/rhino/typed_ast/typed_ast.proto

@@ -364,9 +364,6 @@ enum NodeProperty {
   // Indicates that a SCRIPT node is a goog.module. Remains set after the
   // goog.module is desugared.
   GOOG_MODULE = 30;
-  // Indicates that a SCRIPT represents a transpiled file
-  // TODO: b/279241038 Delete this prop as it's no longer used.
-  TRANSPILED = 34;
   // For passes that work only on deleted funs.
   DELETED = 35;
   // Indicates that the node is an alias or a name from goog.require'd module or