fix(pkg/stanza): remove fmt.Println (open-telemetry#39413)

Fixes open-telemetry#39414.

Author: andrzej-stencel

.chloggen/remove-fmt-println-in-fileconsumer.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: receiver/filelog
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Remove printing to console the names of files which are read by File Log receiver"
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [39414]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

pkg/stanza/fileconsumer/internal/reader/reader.go

@@ -8,7 +8,6 @@ import (
 	"compress/gzip"
 	"context"
 	"errors"
-	"fmt"
 	"io"
 	"os"
 	"sync"
@@ -182,7 +181,6 @@ func (r *Reader) readHeader(ctx context.Context) (doneReadingFile bool) {
 
 func (r *Reader) readContents(ctx context.Context) {
 	var buf []byte
-	fmt.Println(r.fileName)
 	if r.TokenLenState.MinimumLength <= r.initialBufferSize {
 		bufPtr := r.getBufPtrFromPool()
 		buf = *bufPtr