qemu-iotests: get rid of _full_imgproto_details()

Although this function is used, its implementation does nothing
besides echoing a variable name.  There's no need to wrap this
functionality in a function, and based on the one usage it has, it's
not even required to adhere to a convention or code style.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

tests/qemu-iotests/check

@@ -228,7 +228,6 @@ rm -f check.full
 [ -f $TIMESTAMP_FILE ] || touch $TIMESTAMP_FILE
 
 FULL_IMGFMT_DETAILS=`_full_imgfmt_details`
-FULL_IMGPROTO_DETAILS=`_full_imgproto_details`
 FULL_HOST_DETAILS=`_full_platform_details`
 #FULL_MKFS_OPTIONS=`_scratch_mkfs_options`
 #FULL_MOUNT_OPTIONS=`_scratch_mount_options`
@@ -239,7 +238,7 @@ QEMU_IMG      -- "$QEMU_IMG_PROG" $QEMU_IMG_OPTIONS
 QEMU_IO       -- "$QEMU_IO_PROG" $QEMU_IO_OPTIONS
 QEMU_NBD      -- "$QEMU_NBD_PROG" $QEMU_NBD_OPTIONS
 IMGFMT        -- $FULL_IMGFMT_DETAILS
-IMGPROTO      -- $FULL_IMGPROTO_DETAILS
+IMGPROTO      -- $IMGPROTO
 PLATFORM      -- $FULL_HOST_DETAILS
 TEST_DIR      -- $TEST_DIR
 SOCKET_SCM_HELPER -- $SOCKET_SCM_HELPER

tests/qemu-iotests/common.rc

@@ -482,11 +482,6 @@ _full_imgfmt_details()
     fi
 }
 
-_full_imgproto_details()
-{
-    echo "$IMGPROTO"
-}
-
 _full_platform_details()
 {
     os=`uname -s`