[binutils-gdb] Remove unnecessary use of pragma once in pr25618 test

[Alan Modra]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=76fd7455e3eb479690fc23a70555db178d4d3a84

commit 76fd7455e3eb479690fc23a70555db178d4d3a84
Author: Alan Modra <amodra@gmail.com>
Date:   Wed May 7 11:15:49 2025 +0930

    Remove unnecessary use of pragma once in pr25618 test

Diff:
---
 ld/testsuite/ld-plugin/pr25618a.h | 1 -
 ld/testsuite/ld-plugin/pr25618b.h | 1 -
 2 files changed, 2 deletions(-)

diff --git a/ld/testsuite/ld-plugin/pr25618a.h b/ld/testsuite/ld-plugin/pr25618a.h
index 9bf857ce650..04be1943a1b 100644
--- a/ld/testsuite/ld-plugin/pr25618a.h
+++ b/ld/testsuite/ld-plugin/pr25618a.h
@@ -1,2 +1 @@
-#pragma once
 __attribute__((visibility("default"))) int bar();
diff --git a/ld/testsuite/ld-plugin/pr25618b.h b/ld/testsuite/ld-plugin/pr25618b.h
index cd80074f47c..65e72a02e82 100644
--- a/ld/testsuite/ld-plugin/pr25618b.h
+++ b/ld/testsuite/ld-plugin/pr25618b.h
@@ -1,2 +1 @@
-#pragma once
 __attribute__((visibility("default"))) int foo();