Remove keyword multitable generator script

The script was used for generating a easy to read Rust keywords table in
texinfo format.

src/etc/gen-keywords-table.py

@@ -1,103 +0,0 @@
-#!/usr/bin/env python
-
-import sys
-import os.path
-
-def scrub(b):
-  if sys.version_info >= (3,) and type(b) == bytes:
-    return b.decode('ascii')
-  else:
-    return b
-
-src_dir = scrub(os.getenv("CFG_SRC_DIR"))
-if not src_dir:
-  raise Exception("missing env var CFG_SRC_DIR")
-
-
-def get_keywords():
-  keywords_file = os.path.join(src_dir, "doc", "keywords.txt")
-  keywords = []
-  for line in open(keywords_file).readlines():
-    if not line or line.startswith('#'):
-      continue
-    for kw in line.split():
-      if kw.isalnum():
-        keywords.append(kw)
-  return keywords
-
-
-def sort(keywords, ncols):
-  """Sort keywords in a column-major ordered table.
-
-  Args:
-    keywords: List of keywords
-    ncols: Number of columns to be sorted
-  """
-  ## sort and remove duplicates
-  keywords = sorted(list(set(keywords)))
-  sz = len(keywords)
-
-  if sz % ncols > 0:
-    nrows = sz / ncols + 1
-  else:
-    nrows = sz / ncols
-
-  result = []
-  max = ncols * nrows
-  for i in xrange(0, max):
-    result.append("")
-
-  for i in xrange(1, sz+1):
-    if i % nrows == 0:
-      extra = 0
-    else:
-      extra = 1
-    pos = (((i + (nrows - 1)) % nrows) * ncols) + \
-          (i / nrows + extra)
-    result[pos - 1] = keywords[i - 1]
-
-  return rows(result, ncols)
-
-
-def rows(keywords, ncols):
-  """Split input list of keywords into rows.
-
-  Each contains ncols or ncols-1 elements.
-
-  Args:
-    keywords: List of keywords sorted in column-major order
-    ncols: Number of columns
-  """
-  sz = len(keywords)
-  result = []
-  i = 0
-  while i < sz:
-    if i + ncols < sz:
-      se = i + ncols
-    else:
-      se = sz
-    result.append(keywords[i:se])
-    i = se
-  return result
-
-
-def table(rows):
-  """Render rows in a texinfo multitable."""
-  result = ["@multitable @columnfractions .15 .15 .15 .15 .15\n"]
-  for row in rows:
-    result += ["@item @code{" + row[0] + "}\n"];
-    for e in row[1:]:
-      result += ["@tab @code{" + e + "}\n"];
-  result += ["@end multitable\n"];
-  return result
-
-
-def main(oargs):
-  keywords = get_keywords()
-  out_file = open(os.path.join("doc", "keywords.texi"), 'w')
-  for line in table(sort(keywords, 5)):
-    out_file.write(line)
-  out_file.close()
-
-if __name__ == '__main__':
-  main(sys.argv[1:])