coding style: tools: remove empty lines at end of text files

Empty lines at end of text files are useless.
Remove them.

Change-Id: Iea4c8425e137d6252fb2e5b62e0b124c73a01cb6
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5168
Tested-by: jenkins

tools/release/helpers.sh

@@ -57,4 +57,3 @@ Release: ${PACKAGE_RELEASE}
    Type: ${RELEASE_TYPE}
 INFO
 }
-

tools/release/version.sh

@@ -146,4 +146,3 @@ do_version() {
 
 package_info_load
 do_version "$@"
-

tools/st7_dtc_as/st7_dtc_as.pl

@@ -706,4 +706,3 @@ if($opt{'b'}) {
 
 
 0;
-