remove ifdef for older base than git-annex.cabal allows

Annex/Path.hs

@@ -5,8 +5,6 @@
  - Licensed under the GNU GPL version 3 or higher.
  -}
 
-{-# LANGUAGE CPP #-}
-
 module Annex.Path where
 
 import Common
@@ -17,7 +15,7 @@ import System.Environment (getExecutablePath)
 
 {- A fully qualified path to the currently running git-annex program.
  - 
- - getExecutablePath is available since ghc 7.4.2. On OSs it supports
+ - getExecutablePath is used when possible. On OSs it supports
  - well, it returns the complete path to the program. But, on other OSs,
  - it might return just the basename. Fall back to reading the programFile,
  - or searching for the command name in PATH.
@@ -31,12 +29,8 @@ programPath = go =<< getEnv "GIT_ANNEX_PROGRAMPATH"
   where
 	go (Just p) = return p
 	go Nothing = do
-#if MIN_VERSION_base(4,6,0)
 		exe <- getExecutablePath
 		p <- if isAbsolute exe
 			then return exe
 			else readProgramFile
-#else
-		p <- readProgramFile
-#endif
 		maybe cannotFindProgram return =<< searchPath p