[chore] Remove duplicated 'will be's (#13132)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description
Remove duplicated "will be"s.

<!-- Issue number if applicable -->
#### Link to tracking issue
n/a

<!--Describe what testing was performed and which tests were added.-->
#### Testing
n/a

<!--Describe the documentation added.-->
#### Documentation
n/a

<!--Please delete paragraphs that you did not use before submitting.-->

Author: sincejune

cmd/mdatagen/internal/loader_test.go

@@ -224,7 +224,7 @@ func TestLoadMetadata(t *testing.T) {
 					"default.metric.to_be_removed": {
 						Enabled:               true,
 						Description:           "[DEPRECATED] Non-monotonic delta sum double metric enabled by default.",
-						ExtendedDocumentation: "The metric will be will be removed soon.",
+						ExtendedDocumentation: "The metric will be removed soon.",
 						Warnings: Warnings{
 							IfEnabled: "This metric is deprecated and will be removed soon.",
 						},
@@ -269,7 +269,7 @@ func TestLoadMetadata(t *testing.T) {
 					"default.event.to_be_removed": {
 						Enabled:               true,
 						Description:           "[DEPRECATED] Example to-be-removed event enabled by default.",
-						ExtendedDocumentation: "The event will be will be removed soon.",
+						ExtendedDocumentation: "The event will be removed soon.",
 						Warnings: Warnings{
 							IfEnabled: "This event is deprecated and will be removed soon.",
 						},

cmd/mdatagen/internal/sampleconnector/documentation.md

@@ -36,7 +36,7 @@ The metric will be become optional soon.
 
 [DEPRECATED] Non-monotonic delta sum double metric enabled by default.
 
-The metric will be will be removed soon.
+The metric will be removed soon.
 
 | Unit | Metric Type | Value Type | Aggregation Temporality | Monotonic |
 | ---- | ----------- | ---------- | ----------------------- | --------- |

cmd/mdatagen/internal/sampleconnector/metadata.yaml

@@ -135,7 +135,7 @@ metrics:
   default.metric.to_be_removed:
     enabled: true
     description: "[DEPRECATED] Non-monotonic delta sum double metric enabled by default."
-    extended_documentation: The metric will be will be removed soon.
+    extended_documentation: The metric will be removed soon.
     unit: s
     sum:
       value_type: double

cmd/mdatagen/internal/samplereceiver/documentation.md

@@ -36,7 +36,7 @@ The metric will be become optional soon.
 
 [DEPRECATED] Non-monotonic delta sum double metric enabled by default.
 
-The metric will be will be removed soon.
+The metric will be removed soon.
 
 | Unit | Metric Type | Value Type | Aggregation Temporality | Monotonic |
 | ---- | ----------- | ---------- | ----------------------- | --------- |
@@ -129,7 +129,7 @@ Example event enabled by default.
 
 [DEPRECATED] Example to-be-removed event enabled by default.
 
-The event will be will be removed soon.
+The event will be removed soon.
 
 #### Attributes
 

cmd/mdatagen/internal/samplereceiver/metadata.yaml

@@ -125,7 +125,7 @@ events:
   default.event.to_be_removed:
     enabled: true
     description: "[DEPRECATED] Example to-be-removed event enabled by default."
-    extended_documentation: The event will be will be removed soon.
+    extended_documentation: The event will be removed soon.
     warnings:
       if_enabled: This event is deprecated and will be removed soon.
     attributes: [ string_attr, overridden_int_attr, enum_attr, slice_attr, map_attr ]
@@ -167,7 +167,7 @@ metrics:
   default.metric.to_be_removed:
     enabled: true
     description: "[DEPRECATED] Non-monotonic delta sum double metric enabled by default."
-    extended_documentation: The metric will be will be removed soon.
+    extended_documentation: The metric will be removed soon.
     unit: s
     sum:
       value_type: double

cmd/mdatagen/internal/samplescraper/documentation.md

@@ -36,7 +36,7 @@ The metric will be become optional soon.
 
 [DEPRECATED] Non-monotonic delta sum double metric enabled by default.
 
-The metric will be will be removed soon.
+The metric will be removed soon.
 
 | Unit | Metric Type | Value Type | Aggregation Temporality | Monotonic |
 | ---- | ----------- | ---------- | ----------------------- | --------- |

cmd/mdatagen/internal/samplescraper/metadata.yaml

@@ -135,7 +135,7 @@ metrics:
   default.metric.to_be_removed:
     enabled: true
     description: "[DEPRECATED] Non-monotonic delta sum double metric enabled by default."
-    extended_documentation: The metric will be will be removed soon.
+    extended_documentation: The metric will be removed soon.
     unit: s
     sum:
       value_type: double