fix: remove cal-1.0_10.RULE to prevent false positive on C calibration macros

[dikshaa2909]

Fixes #4740

Problem

cal-1.0_10.RULE matched bare CAL-1.0 which tokenizes to only 3 tokens
(cal, 1, 0). This caused false positive CAL-1.0 license detections
in Linux kernel driver files that contain C calibration macros like:

#define BBDC_CAL  (1 << 0)  /* DC cal BB Start */

Affected files include drivers/iio/adc/ad9361.h, ad6676.h and
frequency/ad9517.c from the Analog Devices Linux tree — all correctly
licensed under GPL-2.0, not CAL-1.0.

Reference: https://github.com/analogdevicesinc/linux/blob/main/drivers/iio/adc/ad9361.h

Fix

Remove cal-1.0_10.RULE since cal-1.0_5.RULE already correctly handles
SPDX-License-Identifier: CAL-1.0 detections. The bare CAL-1.0 pattern
is too short (3 tokens) and ambiguous to reliably detect the license without
causing false positives in hardware/embedded code.

Verification

Before: both gpl-2.0 and cal-1.0 detected in ad9361.h
After: only gpl-2.0 detected

Checklist

• Reviewed contribution guidelines
• PR is descriptively titled and links the original issue
• Tests pass
• Commits are in uniquely-named feature branch with no merge conflicts
• Updated documentation pages (not applicable)
• Updated CHANGELOG.rst (if applicable)