Remove get metric value manipulation (#26)

Remove get metric value manipulation

# Checklist

The following aspects have been respected by the author of this pull
request, confirmed by both pull request assignee **and** reviewer:

* Changelog update (necessity checked and entry added or not added
respectively)
  * [x] Pull Request Assignee
  * [x] Reviewer
* README update (necessity checked and entry added or not added
respectively)
  * [x] Pull Request Assignee
  * [x] Reviewer

CHANGELOG.md

@@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
+- manipulation GetMetricValue
 - manipulation SetMetricValuesWithQualityValidity
 - manipulation GenerateElementsInStates
 - manipulation SetOverflow 

src/t2iapi/metric/metric_responses.proto

@@ -10,7 +10,6 @@ syntax = "proto3";
 package t2iapi.metric;
 
 import "t2iapi/basic_responses.proto";
-import "t2iapi/response_types.proto";
 
 option java_package = "com.draeger.medical.t2iapi.metric";
 option java_outer_classname = "MetricResponses";
@@ -25,14 +24,6 @@ message CalibrateMetricResponse {
     repeated string values = 2;
 }
 
-// Describes return value for the rpc that returns current Numeric Metric value
-message MetricValueResponse {
-    BasicResponse result = 1;  // the status of the rpc indicating whether or not it was successful
-    string value = 2;  // string representation of the decimal value of the metric
-    string step_width = 3;  // string representation of the decimal value of the metric value step width
-    PartialCodedValue unit = 4;  // the metric unit, represented by a partial coded value with translation
-}
-
 // Response indicating whether a metric is computer-controlled
 message IsComputerControlledResponse {
     BasicResponse status = 1;  // the status of the rpc indicating whether or not it was successful

src/t2iapi/metric/service.proto

@@ -65,13 +65,6 @@ service MetricService {
     rpc SetMetricValuesInRange (t2iapi.metric.SetMetricValuesInRangeRequest)
         returns (BasicResponse);
 
-    /*
-    Get the current value of the Numeric metric with the given handle.
-    Only values from the gui should be used (not from SDC).
-     */
-    rpc GetMetricValue (BasicHandleRequest)
-        returns (t2iapi.metric.MetricValueResponse);
-
     /*
     Change the status of an operation mode.