Remove support for foo[T] declaration syntax.

Author: erickt

src/comp/syntax/parse/parser.rs

@@ -1765,11 +1765,7 @@ fn parse_ty_param(p: &parser) -> ast::ty_param {
 
 fn parse_ty_params(p: &parser) -> [ast::ty_param] {
     let ty_params: [ast::ty_param] = ~[];
-    if p.peek() == token::LBRACKET {
-        ty_params =
-            parse_seq(token::LBRACKET, token::RBRACKET, some(token::COMMA),
-                      parse_ty_param, p).node;
-    } else if p.peek() == token::LT {
+    if p.peek() == token::LT {
         p.bump();
         ty_params = parse_seq_to_gt(some(token::COMMA), parse_ty_param, p);
     }