Revert "feat: incremental gguf parser (#10822)" (#11114)

This reverts commit 6b04cad7e8.

fs/gguf/reader.go

@@ -1,23 +0,0 @@
-package gguf
-
-import (
-	"bufio"
-	"io"
-)
-
-type bufferedReader struct {
-	offset int64
-	*bufio.Reader
-}
-
-func newBufferedReader(rs io.ReadSeeker, size int) *bufferedReader {
-	return &bufferedReader{
-		Reader: bufio.NewReaderSize(rs, size),
-	}
-}
-
-func (rs *bufferedReader) Read(p []byte) (n int, err error) {
-	n, err = rs.Reader.Read(p)
-	rs.offset += int64(n)
-	return n, err
-}