Remove SyntacticMacroExpansion SourceKitD request again

This turned out not to be needed, see 237cbeb and 03e2c1b.

Author: fwcd

Sources/SourceKitD/sourcekitd_uids.swift

@@ -187,7 +187,6 @@ public struct sourcekitd_requests {
   public let variable_type: sourcekitd_uid_t
   public let relatedidents: sourcekitd_uid_t
   public let semantic_refactoring: sourcekitd_uid_t
-  public let syntactic_macro_expansion: sourcekitd_uid_t
 
   public init(api: sourcekitd_functions_t) {
     crash_exit = api.uid_get_from_cstr("source.request.crash_exit")!
@@ -206,7 +205,6 @@ public struct sourcekitd_requests {
     variable_type = api.uid_get_from_cstr("source.request.variable.type")!
     relatedidents = api.uid_get_from_cstr("source.request.relatedidents")!
     semantic_refactoring = api.uid_get_from_cstr("source.request.semantic.refactoring")!
-    syntactic_macro_expansion = api.uid_get_from_cstr("source.request.syntactic_macro_expansion")!
   }
 }