fix: remove duplicate sub pipe in FileHandle.pm

The `sub pipe` function was defined twice in FileHandle.pm:
- Lines 41-46: early definition added to ensure defined(&pipe) returns
  true before the IO::Handle import filter on line 52
- Lines 103-108: the original definition that was never removed

This caused a "Subroutine pipe redefined" warning when warnings were
enabled (e.g. via jcpan -j 8 -t DateTime::Format::ICal).

Remove the second (redundant) definition. The early definition at
lines 41-46 is sufficient and correctly placed.

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: fglock

src/main/java/org/perlonjava/core/Configuration.java

@@ -33,7 +33,7 @@ public final class Configuration {
      * Automatically populated by Gradle/Maven during build.
      * DO NOT EDIT MANUALLY - this value is replaced at build time.
      */
-    public static final String gitCommitId = "ed722c0cd";
+    public static final String gitCommitId = "20340661d";
 
     /**
      * Git commit date of the build (ISO format: YYYY-MM-DD).

src/main/perl/lib/FileHandle.pm

@@ -95,18 +95,6 @@ sub import {
     };
 }
 
-################################################
-# This is the only exported function we define;
-# the rest come from other classes.
-#
-
-sub pipe {
-    my $r = IO::Handle->new;
-    my $w = IO::Handle->new;
-    CORE::pipe($r, $w) or return undef;
-    ($r, $w);
-}
-
 # Rebless standard file handles
 bless *STDIN{IO},  "FileHandle" if ref *STDIN{IO}  eq "IO::Handle";
 bless *STDOUT{IO}, "FileHandle" if ref *STDOUT{IO} eq "IO::Handle";