Remove R_TIMESTAMP_OFFSET from core registers

This register was never fully ratified so it would be strange to
introduce it already as deprecated.

Author: glopesdev

Device.md

@@ -62,7 +62,6 @@ The following set of Device core registers MUST be implemented. These reserved r
 |[`R_DEVICE_NAME`](#r_device_name-u8-array--human-readable-device-name)|No|No|U8|012|b)|Human-readable device name|Optional|
 |[`R_SERIAL_NUMBER`](#r_serial_number-u16--device-serial-number)|No|No|U16|013|b)|Unique serial number of the device|Deprecated|
 |[`R_CLOCK_CONFIG`](#r_clock_config-u8--synchronization-clock-configuration)|No|No|U8|014|b)|Synchronization clock configuration|Optional|
-|[`R_TIMESTAMP_OFFSET`](#r_timestamp_offset-u8--clock-calibration-offset)|No|No|U8|015|b)|Configures an offset for Timestamp updates|Deprecated|
 |[`R_UID`](#r_uid-16-bytes--unique-identifier)|No|Yes|U8|016|b)|Stores a unique identifier (UID) |Optional|
 |[`R_TAG`](#r_tag-8-bytes--firmware-tag)|-|Yes|U8|017|b)|Firmware tag|Optional|
 |[`R_HEARTBEAT`](#r_heartbeat-u16--device-status-information)|Yes|Yes|U16|018|b)|Monitors device status|Required|
@@ -774,36 +773,6 @@ Supporting `Write` requests to this register is OPTIONAL. If `Write` requests ar
 
 Otherwise, if `Write` requests are not supported, the Device MUST reply to any `Write` requests with the fixed device serial number.
 
-### **`R_TIMESTAMP_OFFSET` (U8) – Clock calibration offset**
-
-> [!WARNING]
->
-> This register is deprecated and MUST NOT be implemented on any new devices.
-
-Address: `015`
-
-```mermaid
----
-displayMode: compact
----
-
-gantt
-    title R_TIMESTAMP_OFFSET (015) [U8]
-
-    dateFormat X
-    axisFormat %
-    tickInterval 0
-
-    section Bit
-    7-0      :byte1, 0, 1
-    section Id
-    RESERVED      :id1, 0, 1
-    section Default
-    0      :d1, 0, 1
-```
-
-When the value of this register is greater than `0` (Zero), the Device timestamp SHOULD be offset by this amount. The register is sensitive to 500 microsecond increments. This register is non-volatile.
-
 
 ## Release Notes