Revert of Reduced skslc memory consumption

src/sksl/SkSLToken.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
  
 #ifndef SKSL_TOKEN
 #define SKSL_TOKEN
 
@@ skipping 139 matching lines @@
     Token() {
     }
 
     Token(Position position, Kind kind, std::string text)
     : fPosition(position)
     , fKind(kind)
     , fText(std::move(text)) {}
 
     Position fPosition;
     Kind fKind;
-    // will be the empty string unless the token has variable text content (identifiers, numeric
-    // literals, and directives)
     std::string fText;
 };
 
 } // namespace
 #endif