Revert "Issue #31 - Look up the dir hierarchy for .git dir"

lib/thor-scmversion/scm_version.rb

@@ -5,24 +5,12 @@ class << self
     #
     # @return [#kind_of? ScmVersion]
     def versioner
-      if is_git?
+      if(File.exist?  (".git"))
         return GitVersion
       else
         return P4Version
       end
     end
-
-    def is_git?
-      file_exists?(Dir.pwd, '.git')
-    end
-
-    def file_exists?(current_dir, file)
-      return true if File.exist?(file)
-      Dir.chdir('..') do
-        return false if Dir.pwd == current_dir
-        file_exists?(current_dir, file)
-      end
-    end
   end
 
   # author Josiah Kiehl <josiah@skirmisher.net>