cmd/gt: fix stale comments and remove dead LogWriter code

- Fix package doc: reference 'internal' package (not 'cmd/gt/internal')
- Remove unused LogWriter struct and its methods (never instantiated,
  repl.RunREPLWithLog passes *os.File directly as io.WriteCloser)
- Remove now-unused 'io' import
- Improve readStdin comment: clarify fallback truncates to 4096 bytes

1 files changed, 2 insertions, 18 deletions

diff --git a/cmd/gt/main.go b/cmd/gt/main.go
index 647f70f..cc4d3e2 100644
--- a/cmd/gt/main.go
+++ b/cmd/gt/main.go
@@ -43,12 +43,11 @@
 //   - rpn/: Handles RPN expression parsing and evaluation
 //   - repl/: Provides interactive Read-Eval-Print Loop mode
 //
-// See the cmd/gt/internal package for version information.
+// See the internal package for version information.
 package main
 
 import (
 	"fmt"
-	"io"
 	"os"
 	"strings"
 
@@ -71,22 +70,6 @@ func main() {
 	}
 }
 
-// LogWriter wraps io.Writer for use with io.MultiWriter in REPL mode.
-// It provides a log writer that can be passed to the REPL.
-type LogWriter struct {
-	writer io.WriteCloser
-}
-
-// Write writes data to the log file.
-func (lw *LogWriter) Write(p []byte) (n int, err error) {
-	return lw.writer.Write(p)
-}
-
-// Close closes the log file.
-func (lw *LogWriter) Close() error {
-	return lw.writer.Close()
-}
-
 // runCommand processes command-line arguments and executes the appropriate action.
 //
 // It handles:
@@ -170,6 +153,7 @@ func runCommand(args []string) (string, error) {
 }
 
 // readStdin reads all input from stdin and returns it as a string.
+// Uses /dev/stdin for full reads; falls back to a single 4096-byte buffer if unavailable.
 func readStdin() (string, error) {
 	data, err := os.ReadFile("/dev/stdin")
 	if err != nil {