[doc] The doc should not say to set the parser state to build trees--it is the default

[kaby76]

This is in regards to #4194 (comment). It's really confusing why I keep seeing people write drivers in the Issues sections or on StackOverflow.com that set the option to build a parse tree. It is the default.

The problem is adding this to the driver confuses what the default constructor does. Does it initialize anything? Should I set other properties in the state of the object? Should I set Profile to false? Should I set Trace to false? What about Lexer()? Should I set defaults there?

• Cpp: Uses default. https://github.com/antlr/antlr4/blob/adbe946416f5f6d794ff4c3322739c3c5c20a90c/doc/cpp-target.md
• CSharp: Setted--unnecessary.

  antlr4/doc/csharp-target.md

  Line 43 in adbe946

  parser.BuildParseTree = true;

• Dart: Setted--unnecessary.

  antlr4/doc/dart-target.md

  Line 92 in adbe946

  parser.buildParseTree = true;

• Go: Setted--unnecessary.

  antlr4/doc/go-target.md

  Line 223 in adbe946

  p.BuildParseTrees = true

• Java: Uses default. https://github.com/antlr/antlr4/blob/adbe946416f5f6d794ff4c3322739c3c5c20a90c/doc/java-target.md
• JavaScript: Setted--unnecessary.

  antlr4/doc/javascript-target.md

  Line 103 in adbe946

  parser.buildParseTrees = true;

• PHP: Setted--unnecessary.

  antlr4/doc/php-target.md

  Line 87 in adbe946

  $parser->setBuildParseTree(true);

• Python: Uses default. https://github.com/antlr/antlr4/blob/adbe946416f5f6d794ff4c3322739c3c5c20a90c/doc/python-target.md
• Swift: Uses default. https://github.com/antlr/antlr4/blob/adbe946416f5f6d794ff4c3322739c3c5c20a90c/doc/swift-target.md
• TypeScript: Uses default. https://github.com/antlr/antlr4/blob/adbe946416f5f6d794ff4c3322739c3c5c20a90c/doc/typescript-target.md

[KvanTTT]

@parrt please close