Remove unused sipdiff script

scripts/sipdiff

@@ -1,67 +0,0 @@
-#!/usr/bin/env bash
-
-DIR=$(git rev-parse --show-toplevel)
-
-# ARGUMENTS
-SIPIFY=NO
-while getopts ":s" opt; do
-  case $opt in
-    s)
-      # sipify header
-      SIPIFY=YES
-      ;;
-    \?)
-      echo "Invalid option: -$OPTARG" >&2
-      exit 1
-      ;;
-  esac
-done
-shift $(($OPTIND - 1))
-
-
-
-for file in $*; do
-  d=${file#*/}
-  d=${d%/*}
-  f=${file##*/}
-  f=${f%.*}
-  header="src/$d/$f.h"
-
-  if ! grep -Fxq "$d/$f.sip" python/auto_sip.blocklist; then
-    echo -e "\033[0;31m$d/$f.sip is an automatically generated SIP file\033[0m"
-    echo -e "  g) \x1B[4mg\x1B[0menerate the SIP file \033[0;32m./scripts/sipify.pl $header > python/$d/$f.sip\033[0m"
-    echo -e "  s) \x1B[4ms\x1B[0mhow the diff"
-    SHOW=NO
-    while read -n 1 n; do
-      echo ""
-      case $n in
-        g)
-          echo "Generating the SIP file ..."
-          pushd ${DIR}
-          ./scripts/sipify.pl $header > python/$d/$f.sip
-          popd
-          break
-          ;;
-        s)
-          SHOW=YES
-          break
-          ;;
-        *)
-         invalid option
-         ;;
-      esac
-    done
-    if [[ $SHOW =~ NO ]]; then
-      continue
-    fi
-  fi
-
-  if [[ $SIPIFY =~ YES ]]; then
-    tempfile=$(mktemp ${DIR}/${f}XXXX --suffix=.h)
-    ${DIR}/scripts/sipify.pl ${DIR}/$header > $tempfile
-  else
-    tempfile=$header
-  fi
-  vimdiff $tempfile python/$d/$f.sip
-
-done