configure: Remove obsolete AC_CHECK_TOOL_PREFIX

This patch removes obsolete AC_CHECK_TOOL_PREFIX.
It has been confirmed that AC_CHECK_TOOL_PREFIX is defined as NOP in
GNU 'autoconf' 2.69 [1], so we can safely remove it.
The 'configure' file has been deleted one blank line by the 'autoconf'
2.69 command .

   [1] autoconf-2.69/share/autoconf/autoconf/programs.m4
   181 # AC_CHECK_TOOL_PREFIX
   182 # --------------------
   183 AU_DEFUN([AC_CHECK_TOOL_PREFIX])

1 files changed, 0 insertions, 1 deletions

diff --git a/configure b/configure
index 1dc3af60b4..37cef37413 100755
--- a/configure
+++ b/configure
@@ -4732,7 +4732,6 @@ fi
 fi
 
 # These programs are version sensitive.
-
 for ac_prog in gnumake gmake make
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.