Revert "Check for old "LyX 2.3" user directory when configuring."

Actually, we DO use versioned directories on Windows.

This reverts commit b738aa53d1.

lib/configure.py

@@ -181,22 +181,6 @@ def checkUpgrade():
                 return
 
 
-def checkUpgradeWin():
-    ''' Check for upgrade from previous version '''
-    cwd = os.getcwd()
-    basename = os.path.basename(cwd)
-    if basename != "LyX":
-        return
-    lyxrc = os.path.join(cwd, outfile)
-    if os.path.isfile(lyxrc):
-        return
-    olddir = os.path.join(os.path.dirname(cwd), "LyX2.3")
-    if not os.path.isdir(oldir):
-        return
-    logger.info('Copying ' + olddir + ' into ' + cwd)
-    copy_tree(olddir, cwd, True)
-
-
 def createDirectories():
     ''' Create the build directories if necessary '''
     for dir in ['bind', 'clipart', 'doc', 'examples', 'images', 'kbd',
@@ -1856,8 +1840,6 @@ Options:
     setEnviron()
     if sys.platform == 'darwin' and len(version_suffix) > 0:
         checkUpgrade()
-    if os.name == 'nt':
-        checkUpgradeWin()
     createDirectories()
     dtl_tools = checkDTLtools()
     ## Write the first part of outfile