[gnome-todo] build: Remove unnecessary checks

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit cbdb5426ebc2f679be74cd70a3852b498f8322b4
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Jul 21 10:14:41 2015 +0100

    build: Remove unnecessary checks

 configure.ac |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 2757563..50b5ad1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,13 +26,9 @@ AM_GLIB_GNU_GETTEXT
 ## don't rerun to this point if we abort
 AC_CACHE_SAVE
 
-AC_PROG_CC
 AM_PROG_CC_C_O
 AC_PROG_CXX
 AC_PROG_INSTALL
-AC_PROG_INSTALL
-AC_SEARCH_LIBS([strerror],[cposix])
-AC_HEADER_STDC
 
 # enable libtool
 LT_PREREQ([2.2.6])