Remove redundant code

Author: rhpvorderman

src/zlib_ng/gzip_ng.py

@@ -180,57 +180,6 @@ def write(self, data):
 _GzipNGReader = _GzipReader
 
 
-def _read_exact(fp, n):
-    '''Read exactly *n* bytes from `fp`
-    This method is required because fp may be unbuffered,
-    i.e. return short reads.
-    '''
-    data = fp.read(n)
-    while len(data) < n:
-        b = fp.read(n - len(data))
-        if not b:
-            raise EOFError("Compressed file ended before the "
-                           "end-of-stream marker was reached")
-        data += b
-    return data
-
-
-def _read_gzip_header(fp):
-    '''Read a gzip header from `fp` and progress to the end of the header.
-    Returns last mtime if header was present or None otherwise.
-    '''
-    magic = fp.read(2)
-    if magic == b'':
-        return None
-
-    if magic != b'\037\213':
-        raise BadGzipFile('Not a gzipped file (%r)' % magic)
-
-    (method, flag, last_mtime) = struct.unpack("<BBIxx", _read_exact(fp, 8))
-    if method != 8:
-        raise BadGzipFile('Unknown compression method')
-
-    if flag & FEXTRA:
-        # Read & discard the extra field, if present
-        extra_len, = struct.unpack("<H", _read_exact(fp, 2))
-        _read_exact(fp, extra_len)
-    if flag & FNAME:
-        # Read and discard a null-terminated string containing the filename
-        while True:
-            s = fp.read(1)
-            if not s or s == b'\000':
-                break
-    if flag & FCOMMENT:
-        # Read and discard a null-terminated string containing a comment
-        while True:
-            s = fp.read(1)
-            if not s or s == b'\000':
-                break
-    if flag & FHCRC:
-        _read_exact(fp, 2)  # Read & discard the 16-bit header CRC
-    return last_mtime
-
-
 def _create_simple_gzip_header(compresslevel: int,
                                mtime=None) -> bytes:
     """