This script will, in the specified directory, find files ending with a space and a 2 -- ' 2' -- and strip that ending off matching files. Read inline comments for more info.

removeThe2.sh

#!/bin/bash

# Explicitly set the directory you want to operate on here
workingPath="/your/path/here"

# Set a custom internal field separator to ease handling
# of filenames that contain spaces
IFS=$'\n'

# Identify files that end in ' 2' and tack on our custom
# field separator
endIn2=$(find "${workingPath}" -regex '.* 2$' | awk '{print $0"\n"}')

# Go through the list of files and rename them
for oldName in $endIn2; do
  newName=$(echo "${oldName}" | awk -F' 2' '{print $1}')
  # show what this script will do
  echo "\"${oldName}\" <-- will become --> \"${newName}\""
  # uncomment the next line after verifying output
  #mv "${oldName}" "${newName}"
done