cleanup tutorial

FrontEnd/TestData/wordcount.cw

@@ -48,7 +48,6 @@
     (return stats))
 
 
-@doc "cdecl attribute disables name mangling"
 (fun main [(param argc s32) (param argv (ptr (ptr u8)))] s32 :
     (trylet stats TextStats (WordCount [os::Stdin]) err :
         (return 1))

FrontEndDocs/tutorial.md

@@ -58,7 +58,7 @@ module:
 
 import fmt
 
-@cdecl fun main(argc s32, argv ^^u8) s32:
+fun main(argc s32, argv ^^u8) s32:
     fmt::print#("hello world\n")
     return 0
 
@@ -70,10 +70,6 @@ The type information in the function declaration follows the Go model of
 identifier followed by type.
 Functions can only return one value.
 
-Annotations are identifiers that start with "@" and can precede certain
-syntactic constructs. Here `@cdecl` disables the name mangling of function main
-so it can be linked against the startup code.
-
 `fmt::print#` is a macro call. All macros names must end in "#".
 
 
@@ -204,8 +200,7 @@ fun WordCount(fd os::FD) union(TextStats, os::Error):
             break
     return stats
 
--- cdecl attribute disables name mangling
-@cdecl fun main(argc s32, argv ^^u8) s32:
+fun main(argc s32, argv ^^u8) s32:
     trylet stats TextStats = WordCount(os::Stdin), err:
         return 1
     -- print# is a stmt macro for printing arbitrary values.