Merge branch 'ak/git-strip-extension-from-dashed-command' into maint

Code simplification.

* ak/git-strip-extension-from-dashed-command:
  git.c: simplify stripping extension of a file in handle_builtin()

git-compat-util.h

@@ -333,10 +333,6 @@ extern char *gitdirname(char *);
 #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
 #endif
 
-#ifndef STRIP_EXTENSION
-#define STRIP_EXTENSION ""
-#endif
-
 #ifndef has_dos_drive_prefix
 static inline int git_has_dos_drive_prefix(const char *path)
 {