Go patch committed: Don't warn for print()

[Ian Lance Taylor via Gcc-patches]

This patch to the Go frontend stops warning for calls of print().  We
used to warn for calls to print(), because it doesn't do anything.
However, a Go 1.18 test uses that call, and it is valid Go.  Change
the compiler to just accept it and compile it; this will produce calls
to printlock and printunlock, and nothing else.  Bootstrapped and ran
Go testsuite on x86_64-pc-linux-gnu.  Committed to mainline.

Ian

e50a79552d567cd49703103d478ab93d805f60c1
diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 8cbd0c19a8d..52f4b423f02 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-263e8d2a2ab57c6f2b3035f370d40476bda87c9f
+b0dcd2d1e5e73952408b9f2d4d86ae12d102b20c
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc
index 3f597654858..1b3b3bf135e 100644
--- a/gcc/go/gofrontend/expressions.cc
+++ b/gcc/go/gofrontend/expressions.cc
@@ -10332,16 +10332,7 @@ Builtin_call_expression::do_check_types(Gogo*)
     case BUILTIN_PRINTLN:
       {
        const Expression_list* args = this->args();
-       if (args == NULL)
-         {
-           if (this->code_ == BUILTIN_PRINT)
-             go_warning_at(this->location(), 0,
-                        "no arguments for built-in function %<%s%>",
-                        (this->code_ == BUILTIN_PRINT
-                         ? "print"
-                         : "println"));
-         }
-       else
+       if (args != NULL)
          {
            for (Expression_list::const_iterator p = args->begin();
                 p != args->end();