unified: Remove some pointless fields

All of these fields have contents that are uniquely determined by the
node they appear on, so they convey no information.

unified/extractor/tree-sitter-swift/grammar.js

@@ -1050,7 +1050,7 @@ module.exports = grammar({
           "if",
           sep1(field("condition", $.if_condition), ","),
           field("body", $.block),
-          optional(seq(field("else_keyword", $["else"]), $._else_options))
+          optional(seq(alias($["else"], "else"), $._else_options))
         )
       ),
     if_condition: ($) =>
@@ -1067,7 +1067,7 @@ module.exports = grammar({
         seq(
           "guard",
           sep1(field("condition", $.if_condition), ","),
-          field("else_keyword", $["else"]),
+          alias($["else"], "else"),
           field("body", $.block)
         )
       ),
@@ -1712,7 +1712,7 @@ module.exports = grammar({
       prec.right(
         seq(
           field("modifiers", optional($.modifiers)),
-          field("declaration_kind", "protocol"),
+          "protocol",
           field("name", alias($.simple_identifier, $.type_identifier)),
           field("type_parameters", optional($.type_parameters)),
           optional(seq(":", $._inheritance_specifiers)),
@@ -1744,7 +1744,7 @@ module.exports = grammar({
         seq(
           field("modifiers", optional($.modifiers)),
           optional("class"),
-          field("name", "init"),
+          "init",
           optional(choice($._quest, field("bang", $.bang))),
           field("type_parameters", optional($.type_parameters)),
           $._function_value_parameters,

unified/extractor/tree-sitter-swift/node-types.yml

@@ -270,7 +270,6 @@ named:
   do_statement:
     body: block
     catch*: catch_block
-  else:
   enum_case_entry:
     data_contents?: enum_type_parameters
     name: simple_identifier
@@ -333,7 +332,6 @@ named:
   guard_statement:
     body: block
     condition+: if_condition
-    else_keyword: else
   hex_literal:
   identifier:
     part+: simple_identifier
@@ -348,7 +346,6 @@ named:
     body: block
     condition+: if_condition
     else_branch?: [block, if_statement]
-    else_keyword?: else
   implicitly_unwrapped_type:
     name: type
   import_declaration:
@@ -370,7 +367,6 @@ named:
     bang?: bang
     body?: block
     modifiers?: modifiers
-    name: "init"
     parameter*: function_parameter
     throws?: [throws, throws_clause]
     type_constraints?: type_constraints
@@ -526,7 +522,6 @@ named:
   protocol_declaration:
     attribute*: attribute
     body: protocol_body
-    declaration_kind: "protocol"
     inherits*: inheritance_specifier
     modifiers?: modifiers
     name: type_identifier
@@ -794,6 +789,7 @@ unnamed:
   - "dsohandle"
   - "dynamic"
   - "each"
+  - "else"
   - "enum"
   - "extension"
   - "externalMacro"