Revert "libflashrom: Return progress state to the library user"

This reverts commit 40892b0c08.

The feature of returning progress for libflashrom users was
introduced in original commit, however later a bug was found and
reported as https://ticket.coreboot.org/issues/390.

Reverting in a release branch to unblock release candidate, since
it is unknown how much time needed to fix the bug. Meanwhile the
feature remains in a master branch and will be fixed under
ticket 390.

TEST=scenarios below run successfully
1) flashrom -h does not show --progress
2) flashrom -p dummy:emulate=W25Q128FV -r /tmp/dump.bin
3) flashrom -p dummy:emulate=W25Q128FV -v /tmp/dump.bin
4) flashrom -p dummy:emulate=W25Q128FV -E
5) head -c 16777216 </dev/urandom >/tmp/image.bin
flashrom -p dummy:image=/tmp/image.bin,emulate=W25Q128FV \
	 -w /tmp/dump.bin

Change-Id: Id3d7ffcaf266a60a44eb453fd09b7c63c05349c2
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/69283
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>

libflashrom.map

@@ -26,7 +26,6 @@ LIBFLASHROM_1.0 {
     flashrom_programmer_init;
     flashrom_programmer_shutdown;
     flashrom_set_log_callback;
-    flashrom_set_progress_callback;
     flashrom_shutdown;
     flashrom_supported_boards;
     flashrom_supported_chipsets;